Question

9 students volunteer for a committee. How many different 7-person committees can be chosen?

Answer 1

Any options?

Answer 2

A.181,440
B.36
C.362,880
D.1

Answer 3

You want to choose 7 people from a set of 9

Answer 4

9 C 7

Answer 5

@Nasa7

Answer 6

You use the formula of nCr.
n is the total number you are choosing from.
r is the number you want to choose.

Answer 7

The formula is
n! / (r! * (n-r)!)
where n is 9 and r is 7

Answer 8

yep @wolf1728 !

Answer 9

9!/(7!*(9-7)!)

Answer 10

9! / (7! * 2!) which equals
9 * 8 / 2
= 72 / 2
= 36
which is B

Answer 11

Thanks a lot the problem was that i needed a calculator @wolf1728

Answer 12

Actually, if you cancel the factors correctly you don't need a calculator

Answer 13

thanks anyway , i have not took math and i forgot all of this , this is for a different class (CCP) @wolf1728

Answer 14

Sorry I just saw your tag back I see @wolf1728 is helping you now :D