Given Data

1. In a row of boys, Aman is 10th from the left and Bobby is 15th from the right.
2. When they swap positions, Aman becomes 22nd from the left.

Question

What is the total number of boys in the row?

Answer

36 boys.

Solution

1. After swapping, Aman occupies Bobby's original position.
2. So, Aman's new position from left (22nd) and Bobby's old position from right (15th) represent the same spot.
3. Total = New rank from left + Old rank from right - 1.
4. Total = 22 + 15 - 1 = 36 boys.