A. 93324
B. 96324
C. 92324
D. 36680
The number of four digited numbers that can be formed from using the digits 2,4,5, 7,8 that are divisible by 4 is
A student is allowed to select atmost n books from a collection of (2n+1) books. If the total number of ways in which he can select books is 63, then n=