A music band that must consists of 4 members is to be formed from a pool of 9 candidates. How many different bands are possible  Options.
A) 100 B) 144 C) 126 D) 56 E) 336
Note that the band must consist of 4 members, not at least 4 members. Hence, all you have to do is 9C4 = 56   Answer (56)
<result>D</result>
A music band that must consists of 4 members is to be formed from a pool of 9 candidates. How many different bands are possible