Question

In CAT entrance examination paper there are 3 sections, each containing 5 questions. A candidate has to solve 5,

choosing at least one from each section. The number of ways he can choose is
Op 1: 2,500
Op 2: 2,250
Op 3: 2,750
Op 4: 3,250

Answer 1

The best and most correct answer providedfrom your question about the entrance examination paper is the second option which is 2,250. The problem can be solved by:

3-1-1 : 5c3*5c1*5c1 *3!/2! = 750
2-2-1 : 5c2*5c2*5c1 *3!/2! = 1500

Adding the two answers:

750 + 1500 = 2250

I hope it has come to your help.