Seven people are preparing to play basketball using a five m

Seven people are preparing to play basketball using a five member team. How many different five person teams can be put together. Hint: Combination of 7 taking 5 at a time.

Solution

from seven member, selecting a five member team.

means that we have to reject two member out of seven member to form a team.

Selecting 2 (otherway around)out of sevel,

Nos of way = nCr = 7C2 = 7*6/2 = 21 ways