The number of ways of selecting 8 books from a library which has 9 books each of Mathematics, Physics, Chemistry and English is:

The number of ways of selecting 8 books from a library which has 9books each of Mathematics,Physics,Chemistry and English is:

Find the number of ways of selecting 5 books from 9 different mathematics books such that a particular book is not included.

The sum of the costs of one book each of Mathematics, Physics and Chemistry is Rs 210. Total cost of a mathematics book, 2 physics books, and a chemistry book is Rs. 240/- Also the total cost of a Mathematics book, 3 physics book and 2 chemistry books is Rs. 300/-. Find the cost of each book using matrices.

The number of ways in which 5 mathematics , 4 physics , 2 chemistry books can be arranged in a shelf so that the books of mathematics books are kept together is

The number of ways of distributing 3 identical physics books and 3 identical mathematics books among three students such that each student gets at least one books is

The number of ways of distributing 3 identical physics books and 3 identical mathematics books among three students such that each student gets at least one books is