There are 10 pots exposed in the shop, 2 of which have hidden defects. the customer buys two pieces. what is the probability that at least one of them has a hidden bug ?
Answers
All the possible scenarios are:
1st.non defective, 2nd.non defective
1st.non defective, 2nd. defective
1st. defective, 2nd. non defective
1st. defective, 2nd. defective
consider the case 1st.non defective, 2nd.non defective
the probability that the first one is non defective is 8/10, since 8 out of 10 are non defective.
In this scenario, the second one is non defective as well. The probability for this to happen is 7/9, since now we have 7 non defective pots, and 9 in total.
This means that the probability of the first to be non defective, and the second non-defective is (8/10) * (7/9)=0.622
similarly we calculate the other cases, as shown in the picture.
P(at least one is defective)=
P(1st.non defective, 2nd. defective)+P(1st. defective, 2nd. non defective)+P(1st. defective, 2nd. defective)=
0.178+0.178+0.022=0.378
Answer: 0.378
Related Questions
What is the angle of rotation of the minute hand of a clock moving from 11:15 to 11:40? Include direction
Answers
25/60*360= 150 degrees. Direction clockwise. In math clockwise is 'negative' so -150 degrees, and counterclockwise would be positive. But if you can say clockwise, the better
A standard die is rolled. P(A)= the probability of rolling a three
P(B)= the probability of rolling a even number
What is P(A or B)
Answers
P(A)= 1/6 since 3 is one possibility out of 6
P(B)= 1/2 since there are 3 numbers that mke this true out of 6 and 3/6= 1/2
P(A or B)= 1/6+1/2
P(A or B)= 2/3
Final answer: 2/3
A club has 12 members. In how many ways can we select four members to go on a trip?
Answers
12C4 = 12!
----------
4! 8!
= 12*11*10*9 11*5*9 = 495
-------------- =
4*3*2*1
a country's population in 1995 was 175 million. In 2000 it was 181 million. Estimate the population in 2020 using exponential growth formula. Round you answer to the nearest million
Answers
The formula is
P=Ae^rt
P 181 million
A 175 million
E constant
R rate of growth?
T time 2,000−1,995=5 years
Solve the formula for r
R=(log (p/A)÷log (e))÷t
R=(log(181÷175)÷log(e))÷5
R=0.0067
Now find the population in 2020
P=Ae^rt
P?
A 175 million
R 0.0067
T time 2,020−1,995=25 years
P=175×e^(0.0067×25)
P=207 million. .....answer
The ordered pairs below represent a relation between x and y. (-3,-3), (-2,0), (-1,3), (0,6), (1,9), (2,12).
Could this set of ordered pairs have been generated by a liner function?
A. No, because the y-values decrease then increase
B. Yes, because the relative difference between y-values and x-values is the same no matter which pairs of (x,y) values you use to calculate it
C. No, because the distance between consecutive y-values is different than the distance between consecutive x-values
D. Yes, because the distance between x-values is inconstant
Answers
are matched respectively to -3, 0, 3, 6, 9, 12.
Thus, as the x-coordinate changes by 1, the y-coordinate changes by 3:
We can represent this change by the following picture:
|
|
(2,12) _ |
|
|
(1,9) _ |
|
|
(0,6) _ |
So, the points are on a straight line, because:
B. Yes, because the relative difference between y-values and x-values is the same no matter which pairs of (x,y) values you use to calculate it
If sin 42° =2/3, then cos 48°=
Answers
Then:
sin 42° = cos(90° - 42°) = cos 48°
IF sin 42° = 2/3, the cos 48° = 2/3
if sin42=2/3 then cos(90-42)=2/3 as well (90-42=48)
Please help me with math question
Answers
J is on -8, so it is 8 places to get to zero
K is on 4
so you have 8 + 4 = 12 units
convert 0.0000001 to a power of 10.
107
10−7
106
10−6
Answers
Answer:
Its actually 10 to the power of -7.
Step-by-step explanation:
This is because it can be written as:
1/10000000
Because there is 7 0's it becomes -7
Therefore its 10 to the power of -7
simplify the expression r^-3s^5t^2/r^2st^-2
Answers
(a^b)/(a^c)=a^(b-c) and a^(-b)=1/(a^b)
(r^-3s^5t^2)/(r^2st^-2)
r^(-3-2)s^(5-1)t^(2--2)
r^-5(s^4)t^4
(s^4t^4)/(r^5)
s^5 * t^2 * t^2 / r^3 * r^2 * s
s^4 * t^2 / r^5
When using Cramer's Rule to solve a system of equations, if the determinant of the coefficient matrix equals zero and neither numerator determinant is zero, then the system _______.
A. has infinite solutions
B. is inconsistent
C. is dependent
D. is consistent
Answers
If the determinant of the coefficient matrix is zero and neither numerator determinant is zero when using Cramer's Rule to solve a system of equations, then the system is inconsistent, meaning there's no solution.
Explanation:When using Cramer's Rule to solve a system of equations, if the determinant of the coefficient matrix equals zero and neither numerator determinant is zero, then the system is inconsistent.
Cramer's Rule is a method applied in linear algebra to solve a system of linear equations. The rule states that the system is inconsistent if the determinant of the coefficient matrix is zero (meaning the equations do not intersect) but at least one of the numerator determinants are nonzero. This condition indicates that there's no solution to the system of equations.
On the contrary, if the determinant of the coefficient matrix is zero an all the numerator determinants are also zero, the system is said to be dependent, meaning it would have infinitely many solutions.
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Identify the function as either a constant, direct variation, absolute value or greatest integer function f (x)=-4
Answers
No matter what the input x is, the output f(x) is going to be -4. Therefore, the output is constant.
Note: f(x) can be interchanged with y. So we can say y = -4.
Find the measures of an interior angle and an exterior angle of a regular polygon with 6 sides.
Answers
To find the measure of one angle, the formula is 360/n where n is the number of the sides of the polygon.
360/6 = 60°
The sum of all internal angles of a polygon can be find with the formula (n-2)*180° where n is the number of the sides. In this case 180(6-2) = 180*4 = 720°
To find one internal angle, follow this formula [180(n-2)] / n = [720/6] = 120°
Anyway, you can pick a vertex and from that vertex start to draw diagonals.
There will be some triangles, the sum of all internal angles of a triangle is 180°. In a polygon, the sum of all internal angles equals to the sum of all internal angles of all the triangles.
Hope I'm clear.
The interior angle of a regular hexagon is 120 degrees, and the exterior angle is 60 degrees.
Explanation:To find the measures of an interior angle and an exterior angle of a regular polygon with 6 sides, we will use the fact that the sum of interior angles of a polygon is given by (n-2)×180°, where 'n' is the number of sides of the polygon. Thus, a regular hexagon will have its interior angles sum to (6-2)×180° = 720°. Since all interior angles in a regular polygon are equal, each interior angle will be 720° ÷ 6 = 120°. The exterior angle of a regular polygon is calculated as 360° ÷ n. Therefore, an exterior angle of a regular hexagon will be 360° ÷ 6 = 60°.
So, the interior angle of a regular hexagon is 120°, and the exterior angle is 60°.
Follow the process of completing the square to solve 2x2 + 8x - 12 = 0. How will the left side of the equation factor in step 5?
A. (2x + 32)2
B. (4x + 8)2
C. (4x + 16)2
Answers
with form
ax^2+bx+c=0
move c to the other side
2x^2+8x=12
x^2 is multiplied -> divide equation by 2
x^2+4x=6
complete square:
divide b=4 by 2
4*1/2=2
square 2
2^2=4
add 4 to both sides
x^2+4x=6
x^2+4x+4=6+4
x^2+4x+4=10
transform to polynom
(x+2)^2=10
this left side is option B multiplied by a factor of 16 and therefore equal:
(4x + 8)^2
(4*4)x^2+(4*2*8)x+8*8
16x^2+64x+64
x^2+4+4
bonus: calculate root
x+2=+/-sqrt(10)
x=-2+/-sqrt(10)
so it is option B
Complete the square to solve [tex]2x^2 + 8x - 12 = 0[/tex].
Soooooooo, [tex](4x + 8)^2[/tex] is your answer. :)
A gift box has a length of 14 inches, a height of 8 inches, and a width of 6 inches. how many square inches of wrapping paper are needed to wrap the box?
Answers
The surface area of the rectangular box is equal to 488 square inches.
What is surface area?The area of the surface of the rectangular box is equal to the total surface area of the rectangular box.
Given that, a gift box has a length of 14 inches, a height of 8 inches, and a width of 6 inches.
The surface area will be calculated as,
SA = 2(6 x 14) + 2(6 x 8) + 2(14 x 8)
SA = 2(84) + 2(48) + 2(112)
SA = 168 + 96 + 224
SA = 488 square inches of paper to wrap the box.
Therefore, the surface area of the rectangular box is equal to 488 square inches.
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Final answer:
To find the square inches of wrapping paper needed for a gift box, calculate the surface area of the box by using its length, height, and width dimensions.
Explanation:
To calculate the square inches of wrapping paper needed to wrap the box, you need to find the surface area of the box.
Calculate the surface area of each side of the box: 2(length x width) + 2(width x height) + 2(length x height).
Plug in the given dimensions: 2(14 x 6) + 2(6 x 8) + 2(14 x 8).
Calculate the total: 2(84) + 2(48) + 2(112) = 168 + 96 + 224 = 488 square inches needed.
#10 with explanation please
Answers
10. 4x = 1
x = 1/4
since there is no y if you graph x = 1/4 you would get a straight vertical line at x = 1/4
since it is a vertical line it is symmetric about the x axis ( it looks the same on both sides of the x axis)
Eight two-person teams are participating in a three-legged race. Find the number of orders in which all 8 teams can finish the race.
Answers
Therefore, the number of orders (combinations) of 2 people at a time from 8 is
₈C₂ = 8!/(2!6!)
= (8*7*6!)/(2*6!)
= (8*7)/2
= 56/2
= 28
Answer: 28
Answer:
thx for points man
Step-by-step explanation:
An and ac are opposite rays.all of the following are true except
A = A,B,C are collinear
B = A,B,C are coplanar
C = AB = AC
D = A is between B and C
Answers
B = A, B, C are coplanar.
(I believe this should be the answer, but I'm not so sure.)
→It is given that, AB and AC are Opposite rays.
Means point ,A , B and C are collinear that is lying in the same line.
→Points are said to be Coplanar , if they lie in the same Plane.
Line segment Joining Points A, B and C lies on the same surface , so we can say that ,these points are Coplanar.
→As, AB and AC are rays , so point A will be in between C and B.
But, it can be sometimes true that,
→AB=AC
So, Incorrect Statement is:
AB=AC
Person 1 can do a certain job in twenty-one minutes, and person 2 can do the same job in twenty-eight minutes. When completing the job together, which expression would be used to represent the amount of work done by person 1?
21
1/21
x/21
21x
Answers
r = 1/21
Answer:
[tex]\frac{1}{21}[/tex] would be used to represent the amount of work done by person 1.
Step-by-step explanation:
When someone does a work in x time,
Then, the work done by the person in one day = [tex]\frac{1}{x}[/tex]
Given,
Time taken by person 1 = 21 minutes
Thus, by the above statement,
The one day work of person 1 = [tex]\frac{1}{21}[/tex]
Hence, [tex]\frac{1}{21}[/tex] would be used to represent the amount of work done by person 1.
Second option is correct.
What is the center and radius of the circle with equation x2 + y2 + 6x + 16y + 64 = 0?
Answers
By making factors:
[tex]x^2+y^+2+6x+16y+64=0\\ x^2+6x+9+y^2+16y+64-9=0\\ (x+3)^2+(y+8)^2=9\\ radius=3 [/tex]
Find the 13th term of the sequence 8, -16, 32, -64, ...
A. 32768
B. -16384
C. -65536
D. None of these
Answers
8
-16
32
-64
128
-256
512
-1024
2048
-4096
8192
-16384
32768
Answer is A
a(n)=ar^(n-1), a=initial term, r=common ratio, n=term number.
The common ratio,r, is -16/8=32/-16=-64/32=-2, and the first term, a, is 8
So the rule for this sequence is:
a(n)=8(-2)^(n-1), so the 13th term is:
a(13)=8(-2^12)
a(13)=32768
Choose the correct description of the graph of the compound inequality x - 3 less than or equal to 5
A- open circle on 8, shading to left
B- closed circle on 8, shading to left
C- open circle on 8, shading to right
D- closer circle on 8, shading to right
Answers
x < = 5 + 3
x < = 8
closed circle on 8 (it is closed because there is an equal sign in the problem)...and since it is less then, it will be shaded to the left.
Answer:
B- closed circle on 8, shading to left.
Step-by-step explanation:
We have been given an inequality [tex]x-3\leq 5[/tex]. We are asked to choose the correct description of the graph of the compound inequality.
Let us solve for x.
[tex]x-3+3\leq 5+3[/tex]
[tex]x\leq 8[/tex]
Since we have been given a less than or equal to sign, so we will have a solid dot at [tex]x=8[/tex].
Since the solutions for our given inequality are less than and equal to 8, so we will shade in all values of x that are to the left of 8.
Therefore, option B is the correct choice.
The graph shows the location of Grant's, Hannah's, and Isobel's houses. Each unit on the graph represents 1 block. A coordinate plane graph is shown. Grants house is located at negative 4 comma 3. Hannahs house is located at 1 comma 3. Isobels house is located at 1 comma negative 4. If Grant walks from his house to Isobel's house, then on to Hannah's house along the path shown, how far will he have walked in blocks? Round your answer to the nearest tenth.
Answers
5^2 + 7^2 = c^2
25 + 49 = c^2
74 = c^2
sqrt 74 = c
8.6 = c
so grant's to Isabelle's is 8.6 blocks, then from there to hannah's house, which is 7 blocks....so he walks a total of 8.6 + 7 = 15.6 blocks
The total distance covered in the graph from Grant to Isobel's house and Isobel's house to Hannah's house is 15.06.
What is a graph?A graph is a diametrical representation of any function between the dependent and independent variables.
For example y = x² form a parabola now by looking at only the graph we can predict that it has only a positive value irrespective of the interval of x.
As per the given coordinate has been drawn in the graph below,
The locus of the path from Grant's house to Isobel's house and then Hannah's house is making a right-angle triangle.
By Pythagoras' theorem,
Distance from Grant's house to Isobel's house ⇒
√(4² + 7²) = 8.06
The distance from Isobel's house to Hannah's house ⇒ 3 + | -4| = 7
Therefore, 8.06 + 7 = 15.06.
Hence "The total distance covered in the graph from Grant to Isobel's house and Isobel's house to Hannah's house is 15.06".
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Pleaseeeeeeeeeee help what is circle b
Answers
ne S is the blue line, where does it contact circle B?
it touches at Point K,
so that would be the tangency.
Answer Point K
Which shows the graph of the solution set of 3y – 2x > –18? Mark this and return
Answers
First, you disregard the inequality to graph the equation. Find the x- and y-intercepts, plot them, and connect these two dots by extending infinitely from both sides.
x-intercept: let y = 0
0 - 2x = -18
x = 9
y-intercept: let x = 0
3y- 0 = -18
y = -6.
The graph is shown in the picture. Next, you test the inequality by choosing a random data point that does not coincide with any of the data points passed by the line. Suppose, we choose the origin (0,0)
3y- 2x > -18
3(0) - 2(0) > -18
0 > 18
The inequality is true for (0,0), Thus, the shaded region must include this point. All of the region to the left bounded by the line is a solution. Note that the data points are hollow because they are not part of the solution because of the inequality '>'. If it were ≥, then those points would be solid.
Find the next term in the sequence:
1/3,2/9,3/27,...
A. 4/36
B. 4/54
C. 4/81
D. 4/109
Answers
Now, let's apply this rule to the last fraction. The denominator multiplied by three would be 81.
Therefore, the answer is C. 4/81
The sum of 2 consecutive odd interferes is 92 find the numbers
Answers
92/2 = 46
46-1 =45
46+1 =47
45+47 = 92
numbers are 45 & 47
Find the domain of f of x equals negative square root of the quantity two x plus four, plus 3?
Answers
Janelle is at the movie theater and has $20 to spend.
She spends $8 on a ticket and wants to buy some snacks. Each snack costs $4.99.
How many snacks, x, can Janelle buy?
Inequality: 20≥8 + 4.99x
Please answer, its urgent
Answers
After purchasing a movie ticket for $8, Janelle has $12 left to spend on snacks. Each snack costs $4.99, which means she can buy a maximum of 2 snacks.
Explanation:Janelle started with $20 and has already spent $8 on a ticket, leaving her with $20 - $8 = $12 for snacks. Each snack costs $4.99. To determine how many snacks, represented by x, Janelle can buy, we can set up the inequality 12 ≥ 4.99x. Dividing both sides of the inequality by the cost of one snack (4.99) gives us x ≤ ≈ 2.4. Since Janelle cannot buy a fraction of a snack, she can buy a maximum of 2 snacks with her remaining $12.
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Where can the lines containing the altitudes of an obtuse triangle intersect.
Answers
Answer: The lines containing the altitudes of an obtuse triangle intersect at a point which lies outside the triangle called orthocenter.
Explanation:-
A line which passes through a vertex of the triangle and is perpendicular to the opposite side is called an altitude of the triangle.
The point where all three altitudes of the triangle intersect is called its orthocenter .
Orthocenter of acute triangle lies inside the triangle.Orthocenter of right triangle lies on the triangle.Orthocenter of obtuse triangle lies outside the triangle.need help: write the expression in a complete factored form: x²-9x+xy-9y
Answers
[tex]( x^{2} -9x)+(xy-9y)[/tex]
Now work on finding a common thing between the 2 groups:
[tex]x(x-9)+y(x-9)[/tex]
See, what you have in common there now is the (x-9) that you can factor out:
[tex](x-9)(x+y)[/tex]
And that is factored completely.