There are six periods in each working day of the school. In how many ways can one arrange 5 subjects such that each subject is allowed at least one period?

If there are 5 periods in each working day of a school,then the number of ways that you can arrange 4 subjects during the working day is

In how many ways can 10 identical toys be given to 3 children such that each receive at least one toy ?

In how many ways can 5 subjects be chosen from 9 subjects if three subjects are compulsory?

In how many ways can 7 cross marks X be placed in the given figure so that each row has at least one cross mark?

There are three section A,B, C in a paper each section having 5 questions . In how many ways a student can solve exactly 5 questions taken at least one question from each section.

In how many ways can 25 objects be distributed among 5 persons if each gets at least 1 but not morethan 11?

In how many ways can 20 identical toys be distributed among 4 children so that each one gets at least 3 toys?

Two subjects are compulsory for a student in an examination. In how many ways can a student select 5 subjects out of given 10 subjects?