In how many ways can a selection of 4 be made from 10 persons such that one particular person is always excluded?

In how many ways can a selection of 4 be made from 10 persons such that one particular person is always included

In how many ways can one post 3 letters in 5 post boxes?

In how many ways can 5 boys and 3 girls stand in a row such that no two girls are together?

How many 5-member commitees can be formed from 8 teachers and 3 students so that a particular teacher is always selected for each committee?

How many types of matrices can be formed from 11 elements ?

How many types of matrices can be formed from 8 elements ?

A group consists of 4 girls and 7 boys.Ion how many ways can a tean of 5 members be selected so that the team has at least one boy and one girl?

From 10 boys and 20 girls, a committee of 2 boys and 3 girls is to be formed. In how many ways can this be done if a particular girl is excluded.

In how many ways can 7 boys and 5 girls be arranged in a row so that no two girls come together?

In how many ways can the letters in the word GUWAHATI be arranged such that all the vowels are together