2 years ago

It’s my final Test please help

Mathematics

1 answer:

satela [25.4K]2 years ago

8 0

The correct answer is A :)

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kramer

Answer:

You are right.

Step-by-step explanation:

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2 years ago

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2 years ago

There are 25 students in the class. 10 students have sports practice after school. What is the ratio of students that do have pr

viktelen [127]

Answer:

2:3 is the answer

Step-by-step explanation:

No. of students those that do not practice = 25-10 = 15

So,

10:15 means 10 upon 15

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2 years ago

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3 years ago

A company hired 15 new employees. They want to randomly assign 4 of them to work in the graveyard shift. In how many ways can th

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Answer:

This assignment can be made in 1365 ways.

Step-by-step explanation:

The order in which the shifts are assigned is not important. For example, employees A, B, C, D and D,C,B,A being assigned is the same thing. So, we use the combinations formula to solve this question.

Combinations Formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

In this question:

Assignment of 4 employees, from a set of 15. So

$C_{15,4} = \frac{15!}{4!(15-4)!} = 1365$

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2 years ago