Committee X has 4 members,committees Y has 5 members,and these committees have no members in common If a task force is to be formed consisting of one member of X and one member of Y,how many different task forces are possible ?

Committee X has 4 members,committees Y has 5 members,and these committees have no members in common If a task force is to be formed consisting of one member of X and one member of Y,how many different task forces are possible ?

A 6

B 9

C 10

D 20

Solution

Correct Answer: Option D

কমিটি x/⁴C₁×কমিটি y/⁵C₁
=4×5=20