1) Karun is 5th from the left and Panth is 6th from the right.2) When they exchange their position, Karun becomes 13th from the left.=> The number of boys in the row = Karun position from the left + Karun position from the right - 1=> The number of boys in the row = 13 + 6 “ 1 = 19 - 1 = 18Position of Panth from the right:=> The number of boys in the row = Panth position from the left + Panth position from the right - 1=> Panth position from the right = The number of boys in the row - Panth position from the left + 1=> Panth position from the right = 18 - 5 + 1 = 19 - 5 = 14Hence, total œ14 students in the row.