SOLUTION: How many committees can be formed from a group of 9 doctors if each committee consists of 7 doctors?
This is one of 25 questions that I must explain how to do, and I have no ide
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Question 354178: How many committees can be formed from a group of 9 doctors if each committee consists of 7 doctors?
This is one of 25 questions that I must explain how to do, and I have no idea! Please help; it is greatly appreciated!
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
The number of combinations of a set of n objects taken r at a time is given by nCr = (n!)/(r!(n - r)!).
.
9 CHOOSE 7
9C7 = 9!/7!2! = (9*8/2) = 36 ways
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