There are 3 books of mathematics, 4 of science, and 5 of literature. How many different collections can be made such that each collection consists of one book of each subject.

There are three books of physics, four of chemistry and five of mathematics. How many different collections can be made such that each collection consists of (i) one book of each subject (ii) atleast one book of each subject. (iii) atleast one book of mathematics.

There are 3 books of Mathematics, 4 of Physics and 5 of English. How many different collections can be made such that each consists at least one book of each subject ?

Out of 3 books on Economics , 4 books on Political Sciences and 5 books on Geography ,how many collections can be made, If each collection consists of at least one book on each subject?

Out of 3 books on Economics , 4 books on Political Sciences and 5 books on Geography ,how many collections can be made, If each collection consists of exactly one book on each subject,

In how many ways 12 different books can be distributed equally among 3 persons?

How many different 5-letter words can be formed from the word ORANGE using each letter only once?

How many selection of 4 books can be made from 8 different books?

There are 6 books on mathematics, 4 books on physics annd 5 books on chemistry in a book shop. The number of ways can a student purchase either a book on mathematics or a book on chemistry, is

There are p copies each of n different books. Find the number of ways in which a nonempty selection can be made from them.

There are p copies each of n different books. Find the number of ways in which a nonempty selection can be made from them.