In a claa there are 10 students out of them 7 are boysa team

Solution

Solution:

105 ways

Explanation

There are total sstudents

no of boys=10-7=3

=est of them=-

a team be firmed with 6 students

selecting 4 boys from 7 can be done in 7C4 ways

and selecting 2 from the remaining 3 can be done in 3C2 ways

no of ways of seleting a team of 6 with 4 must be boys .=7C4 *3C2 (note:denominatot=4+2=6 to be formed )

=35*3

=105

in 105 ways a team can be formed with 6 students of them 4 must be boys .