Question

There are m copies each ofn different books in a university library. The number of ways in which one or more than one book can be selected is
A. `m^(n)+1`
B. `(m+1)^(n)-1`
C. `(n+1)^(n)-m`
D. m

Answer 1

There are (m+1) choices for each of n different boods. So, the total number of choices is `(m+1)^(n)` including one choice in which we do not select any book.
Hence, the required number of ways `=(m+1)^(n)-1`.