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malfutka [58]
2 years ago
10

A student is told to work any 8 out of 10 questions on an exam. In how many different ways can he complete the exam

Mathematics
1 answer:
Korolek [52]2 years ago
7 0

Answer:

Step-by-step explanation:

Assuming the order in which he answers the questions matter the answer is the number of permutations of 8 in 10.

This is 10! / (10-8)!

= 1,814.400.

If the order does not matter then the answer is the number of combinations of 8 from 10:

This is 10!/8!*2!

= 45.

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15

Step-by-step explanation:

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3 years ago
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a certain job can be done in 20 hours by 4 people. how many people are needed to do the same job in 10 hours?
maxonik [38]
If it takes 4 people to get a job done in 20 hours, then in 10 hours, it will take 2 people to complete the same job.
To find out how many people are needed to do this job in 10 hours, we can see that we got to 10 hours by dividing 20 by two so, to see how many people are needed to complete this same job in ten hours, we would just divide 4 people by 2 which is 2 people.
So, in conclusion, if it takes a certain job to be done in 20 hours by 4 people, then it would take 10 hours for that same job to be completed by 2 people.
Glad I could help!
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2 years ago
You are skiing down a mountain with a vertical height of 1250 feet. The distance that you ski as you go from the top down to the
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Step-by-step explanation:

here is the answer to your question

5 0
3 years ago
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solmaris [256]

Answer:

A

Step-by-step explanation:

All pieces of data for seventh grade classes are larger than that of any kindergarten class on the table. This also proves with the mean provided.

The MAD, mean absolute deviation, helps you to identify the variation. The MAD for seventh grade was significantly larger than that of the kinder classes. The range for both sets of data is two times one another, further proving that 7th grade classes varies more.

C and D are irrelevant, and B says "varies less" which is the opposite of what's going on.

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5 0
3 years ago
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Point V is on line segment \overline{UW}
ser-zykov [4K]

The measure of VW from the given expressions is 4

<h3>Line segments</h3>

If the point V is on the line Uw, then;

UW = UV + VW

Given the following

VW=x, UV=3x-1 and UW=5x-5

Substitute

5x - 5 = 3x-1+x
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Collect like terms

x = -1 + 5

x = 4

VW = x = 4

Hence the measure of VW from the given expressions is 4

Learn more on line segment here: brainly.com/question/2437195

#SPJ1

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