There are k different books and I copies of each in a college library The number of ways in - Maths - Permutations and Combinations

Question

There are k different books and I copies of each in a college
library The number of ways in which a student can make a selection
of one or more books isa) (k+1)I b)(I+1)k c)(k+1)I-1 d) (I+1)K-1

Rajat Sethi · Accepted Answer

There are total of k different books each having I copiesSince, Student can make selection of 0,1,2,3,
I books out of each typeThus, the no of ways in which a student can make a selection of one or more books=(I+1)(I+1)
(I+1)  - 1=(I+1)k-1

There are k different books and I copies of each in a college library. The number of ways in which a student can make a selection of one or more books isa) (k+1)I b)(I+1)k c)(k+1)I-1 d) (I+1)K-1