Answer:
Total way of selection is
250046000
Step-by-step explanation:
Total ways of selecting 5 seniors from 9 is 9c5
and Total ways of selecting 3 juniors from 7 is 7c3
ways of selecting 4 sopho from 8 is 8c4
ways of selecting 6 freshman from 10 is 10c6
now, total way of selection come to be
10c6 × 8c4 × 7c3 × 9c5
=210×70×35×126
=250047000
✌️:)