• # question_answer In a row of boys, if A who is tenth from the left and B who is ninth from the right interchange their positions, Now, A becomes seventeen from the left. How many boys are there in the row? A)  25                    B)  27   C)  28                    D)  31

Total number of Boys = (Initial Position of B + New Position of $A-1)$$=9+17-1=25$