Question

If there are

12 books in the rack, a person has to choose 5
out of them. In how many ways
can he choose books,if one
book is never selected?

Answer 1

462 ways

Explanation:

One book never selected means 12 - 1 = 11.

So to find the number of ways, 11C5 which equals to: 11!/(5!(11-5)!) = 462