A committee of 5 people is to be selected from 9 people. How many different committees are possible?
Select
A) 28
B) 40
C) 56
D) 129
E) 336
Because the order does not matter in selecting 5 people for the committee, this is a combination question.   The number of ways to select 5 people from 9 = 9C5 = 9!/5!*4! = 129. Hence 129.
<result>D</result>
A committee of 5 people is to be selected from 9 people. How many different committees are possible?