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

There are 4n things of which n are alike and the rest different. Find the number of permutations of 4n things taken 2n at a time, each permutation containing the n like things.

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

The number of circular permutations 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 is

Assertion (A) : The number of selections of 20 distinct things taken 8 at a time is same as that taken 12 at a time Reason (R): C(n, r) = C(n, s), if n = r + s

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

The number of linear permutations of n' things in which there are Plike thing of one kind,g like things of second kinds 'like things of third kind and the rest are different is (n!)/(p!q!r!) The number of ways of arranging the letter of the word ARRANGE so,that.The two R' come together is