Question

In how many ways can 4 books be selected out of 10 books on different subjects ?

Answer 1

2 books are excluded that means thoose will be offcount.
So total book is
10-2=8
out of which 4 can be selected.
Hence no. Of ways is
8C4 = 70

Answer 2

Hi mate

2 books are excluded that means thoose will be offcount.

So total book is

10-2=8

out of which 4 can be selected.

Hence no. Of ways is

8C4 = 70

Hope this helps you