SOLUTION: How many ways can a committee of 7 be chosen from 20 people? I know you use 20 C 7 and that the answer is 77520, but I do not understand HOW to get the answer, can anyone do it st

SOLUTION: How many ways can a committee of 7 be chosen from 20 people? I know you use 20 C 7 and that the answer is 77520, but I do not understand HOW to get the answer, can anyone do it st

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Question 264622: How many ways can a committee of 7 be chosen from 20 people?
I know you use 20 C 7 and that the answer is 77520, but I do not understand HOW to get the answer, can anyone do it step by step?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
20 C 7
20!/7!13!
20!=2.4329*10^18
7!=5,040
13!=6.227*10^9
2.4329*10^18/(5,040*6.227*10^9)
2.4329*10^18/3.138*10^13
77,520 ANS.
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