SOLUTION: You have been asked to go to Dr. Roy's class and get 4 people to help move some desks in a different classroom. If there are 12 people in the class how many different ways can you

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Question 1118814: You have been asked to go to Dr. Roy's class and get 4 people to help move some desks in a different classroom. If there are 12 people in the class how many different ways can you select 4 people?
Answer by ikleyn(52795) About Me  (Show Source):
You can put this solution on YOUR website!
.
C%5B12%5D%5E4 = %2812%2A11%2A10%2A9%29%2F%281%2A2%2A3%2A4%29 ways.


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Comment from student: So, what does this equal to/ the final answer? Do you multiply “12*11*10*9” ,
which equals to “11880” over 1*2*3*4 which equals to 24? Does anything have to be reduced, to its lowest terms? Thanks.
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My response. Yes, everything have to be reduced.

For it, simply divide the numerator by denominator.

You can use your calculator.


As I see from your response, your knowledge on the subject are/is about zero.

To increase your knowledge, read the lessons
    - Introduction to Combinations
    - PROOF of the formula on the number of Combinations
    - Problems on Combinations
    - OVERVIEW of lessons on Permutations and Combinations
in this site.