Question

Here are 16 people, they divide into four groups, now from those four groups select a team of three members, such that no two members of the team should belong to the same group. How many ways are possible?

Answer 1

here our sample space will be 16
and
let a be the event of getting selected of there member
n(a)=13
possibility=n(a)
n(s)
=13
16