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

If N denotes the number of ways of selecting r objects of out of n distinct objects (rgeqn) with unlimited repetition but with each object included at least once in selection, then N is equal is a. .^(r-1)C_(r-n) b. .^(r-1)C_n c. .^(r-1)C_(n-1) d. none of these

Find the number of ways of selecting 9 balls from 6 red balls, 5 white balls and 5 blue balls if each selection consists of 3 balls of each colour.

Find the total number of ways of selecting 5 letters from the word INDEPENDENT .

Find the total number of ways of selecting five letters from the word INDEPENDENT.

if n objects are arranged in a row then the number of ways of selecting three of these objects so that no two of them are next to each other is

Find the number of ways of selection of at least one vowel and one consonant from the word TRlPLE.

In how many ways can a party of 6 men be selected out of 10 Hindus, 8 Muslims, and 6 Christians, if the party consists of atleast one person of each religion? Find the number of ways of selection. (Consider only the religion of the person).

If n objects are arrange in a row, then the number of ways of selecting three of these objects so that no two of them are next to each other is a. "^(n-2)C_3 b. "^(n-3)C_2 c. "^(n-3)C_3 d. none of these

Find the number of ways of disturbing n identicalobjects among n persons if at least n-3 persons get none of these objects.

The number of ways of selecting 10 balls from unlimited number of red, black, white and green balls, is