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 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

There are five books on Mathematics and 6 books on Physics in a book shop.In how many ways can a student buy: (i) a Mathematics book and a Physics book (ii) either a Mathematics book or a Physics book?

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.

A school library has 75 books on Mathematics, 35 books on physics. A student can choose only one book , In how many ways a student can choose a book on Mathematics or physics?

There are five books on Mathematics and 6 books on Physics in a book shop. In how many ways can a student buy : (i) a Mathematics book and a Physics book (ii) either a Mathematics book or a Physics book?

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?

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?

Elevent books consisting of 5 mathematics, 4 physics and 2 chemistry are place don a shelf. The number of possible ways of arranging them, on the assumption that the books of the same subject are all together, is-