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dimaraw [331]
2 years ago
11

There are 10 USB drives in a box and 3 are defective. Two drives are to be selected, one after the other. What is the probabilit

y of selecting a defective USB followed by another defective USB?
Mathematics
1 answer:
Lynna [10]2 years ago
5 0

|\Omega|=10\cdot9=90\\|A|=3\cdot2=6\\\\P(A)=\dfrac{6}{90}=\dfrac{1}{15}\approx6.7\%

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The answer should be B (5/3, 0)

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How many spaces does it move over
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The point at the bottom has to move over 2 to the left to be aligned with the point at the top however they will have a 3 space in between the 2 same for the point at the top, the top point moves over 2 to the right to be aligned with the bottom point, then they will have a 3 square space between each other.

6 0
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Read 2 more answers
A college student has $240 to use for laundry money. Each time he does laundry, he spends $7.50. Which equation represents the a
Lady bird [3.3K]

Answer:

B

Step-by-step explanation:

x = the number of times he does laundry.

Let's say he does the laundry 5 times then x = 5.

Each time costs $7,50.

If you want to know how much money he has spent after 5 times, you have to calculate 5 times $7,50. 7,5 times 5 = 37.5.

M stands for how much money he still has left from the 240 dollars.

If you apply the formula it would be 'M = 240 - 7.50x (7.50 times 5) = 240 - 37.5 = 202.5'

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How do you no if a problem is single<br> or proper
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7 0
3 years ago
A handyman company serves customers from two cities 60 miles apart, Jonesville and Bellevue. The company would like to position
maw [93]

The new office should be at a distance of 37.5 miles from Jonesville.

The weighted mean is the sum of all elements in a data-set multiplied by their weights, divided by the sum of the weights. For example, if x1 and x2 are the elements with weights w1 and w2 respectively, then the weighted average is calculated using the given formula-

M =  {(x1*w1) + (x2*w2)}/ (w1+w2)

Here, we are given that two cities Jonesville and Bellevue, 60 miles apart.

Let Jonesville be at point 0 and Bellevue be at point 60.

Jonesville has a weight of 3 and Bellevue has a weight of 5.

Thus, the weighted average can be calculated as follows-

Mean = {(60*5) + (0*3)}/8

= 300/8

= 75/2

= 37.5

Thus, the new office should be at a distance of 37.5 miles from Jonesville.

Learn more about weighted averages here-

brainly.com/question/28507971

#SPJ1

4 0
1 year ago
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