The number of combination of 16 things, 8 of which are alike and the rest different, taken 8 at a time is (A) 256 (B)258 (C) 262 (D) None of these 36

The number of combination of 16 things 8 of which are a like and the rest different,taken 8 at a time is

The number of circular permutations of 8 things taken 4 at a time is

The number of circular permutations of 8 things taken 4 at a time is

The number of circular permutation of 8 things taken 4 at a time is

2.The number of permutations of 8 things taken at a time is 1680, Then r=

The number of circular permutations of 8 things taken 4 at a time in both directions is

Out of 14 things 10 are alike and rests are different.Find the number of combinations taken 10 at a time.

The number of combinations of n different things taken r at a time in which p particular things always occur is -

The number of combinations of n different of n different things taken r at a time in which p particular things never occur is -

If the number of combinations of n different things taken (r+r) at a time be equal to the number of combinations taken (r-r) at a time , find the value of n.