A bookshelf contains 7 different Mathematics textbooks and 5 different Physics textbooks. How many groups of 3 Mathematics and 3 physics textbooks can be selected?

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?

A total of 5 different mathematics books,4 different physics books and 2 differentchemistry books are to be arranged in a row in a book shelf.Which of the following is/are true?

Out of 80 students who secured first class marks in Matchematics or in Physics , 50 obtained first class marks in Mathematics and 10 in both Physics and Mathematics. How many students secured first class marks in Physics only ?