The number of derangement of 5 distinct objects is

If a group of n distinct objects, the number of arrangements of 4 object is 12 times the number of arrangements of 2 objects, then the number of objects is (a) 10 (b) 8 (c) 6 (d) none of these

Find the number of arranging 11 distinct objects taken 4 at a time so that a specified object. (a) always occurs (b) never occurs.

If a group of n distinct objects,the number of arrangements of 4 object is 12 xx the number of arrangements of 2 objects,then the number of objects is (a) 10 (b) 8(c)6(d) none of these

The number of ways in which 7 distinct objects can be distributed among 4 children is

The number of ways in which five distinct objects can be put into three identical boxes so that no box remains empty is

The number of ways in which n distinct objects can be put into two different boxes is:

The number of ways in which n distinct objects can be put into two different boxes, is

The number of ways in which n distinct objects can be put into two identical boxes so that no box remains empty, is

The number of ways in which five distinct objects can be put into three identical boxes so that no box remains empty is