In how many ways can 5 sportsmen be selected from a group of 10 ?

In how many ways can a committee be selected from 15 persons if the committee is to have : 3 members.

In how many ways can a committee be selected from 15 persons if the committee is to have : 13 members.

In how many ways can 8 students be seated in : a line ?

In how many ways can 5 members forming a committee out of 10 be selected so that : two particular members must be included?

In how many ways can 5 members forming a committee out of 10 be selected so that : two particular members must not be included ?

In how many ways can 15 things be divided into groups of 8, 4 and 3 respectively.

In how many ways can 5 girls be seated in a row so that two girls Ridhi and Sanya are always together?

In how many ways can 5 girls be seated in a row so that two girls Ridhi and Sanya are never together?

In how many ways can 3 people be seated in a row containing 7 seats ?

In how many ways can a tissue grow in size?