Question

A library has 11 books on Chemistry, 11 books on Mathematics and 11 books on Physics. In how many ways can these books be arranged in groups of eleven?

Answer 1

(11x10x9x8x7x6x5x4x3x2x1)x3= answer

Answer 2

remember the concept of number of ways in which mn different things can be divided equally into m groups each containing n objects where the order of group is not important.

Answer 3

{{3*11!/11*11*11}*1/3!}

Answer 4

now here m=3 and n=11

Answer 5

is this correct.. guys?