SOLUTION: A committee of 4 students is to be formed from members of the student council. The student council contains 13 girls and 12 boys. How many committees will contain only boys.

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Question 139940: A committee of 4 students is to be formed from members of the student council. The student council contains 13 girls and 12 boys. How many committees will contain only boys.
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
12C4=12!/(12-4)!*4!
=(12*11*10*9*8!)/(8!*4!)
=(12*11*10*9)/(4*3*2)
=11*5*9
=495
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Ed