In how many ways `3` books of Mathematics, `4` books of Physics and `2` books of Chemistry can be arranged on a table if all the books of one subject placed together?

There are 5 books on Mathematics, 4 books on Physics and 3 books on Chemistry. In how many ways can these books be arranged in a shelf if books of same subject should.be together.

In how many ways 4 mathematics books , 3 physics books, 2 chemistry books and 1 biology book can be arranged on a shelf so that all books of the same subjects are together ?

In how many ways can, 3 books on computer, 3 books on Economics and 5 books on commerce be arranged, if the books of each subject are kept together.

In how many ways can 4 books of math and 3 books of English and 5 books of sociology be arranged on a shelf so that (a) same subject are together (b) only sociology books are kept together (c) only English books are kept together

In how many ways 7 books can be arranged from 10 books?

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

The number of ways in which 4 books on Mathematics and 3 books on English can be placed in a shelf, so that the books on the same subject always remain together is

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

There are 6 books on mathematics, 4 books on physics and 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