Find the number of ways of selecting 3 pairs from 8 distinct objects.

Find the number of ways of selecting 5 objects from 9 dissimilar objects such that a particular object is included

Find the number of ways of selecting 5 objects from 9 dissimilar objects such that (i) a particular object is included (ii) a particular object is not included.

The number of ways of selecting 3 objects from eight object is

The number of ways of selecting 6 objects from eight objects is

If n denotes the number of ways of selecting r objects of out of n distinct objects (rgeqn) with unlimited repetition but with each objet included at least once in selection, then n is equal is

Find the number of ways of selecting 7 members from a contingent of 10 soldiers

Which of the following is not the number of ways of selecting n objects from 2n objects of which n objects are identical