How many ways can a committee of 4 be selected from a club with 10 members?

If all committee members have identical jobs, then there are

C (10,4) = 10! / (4! (10-4) !) = 10! / (4!6!) = 10*9*8*7 / (1*2*3*4) = 210

ways to select 4 committee members from a club of 10 members.