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 : 5c35c15c1 3!/2! = 750
2-2-1 : 5c25c25c1 3!/2! = 1500
Adding the two answers:
750 + 1500 = 2250
I hope it has come to your help.
