Question

if a library has 45 books on physics and 60 books on mathematics, then in how many ways can a student read a book either of physics or of mathematics?

Answer 1

A student can read a book of either physics or mathematics on 45 • 60 ways as it is simple combination. A - 2700 ways.

Answer 2

NO. OF WAYS THE STUDENT CAN READ :2700

Explanation:

let us solve for it :

The number of books on physics = 45

The number of books on mathematics = 60

Let us find the no. of ways in which a student can read a book

The no. of ways in which a student can read a book = 45*60

                                                                                = 2700