If the true discount on a certain sum due 6 months hence at 15% is Rs. 120, what is the banker's discount on the same sum for the same time and at the same rate?
View answer & explanation Ans: Rs. 129
Correct Answer: Rs. 129
Banker's gain = simple interest on the true discount = 120 x 15 x (1/2) / 100 = Rs. 9, so the banker's discount = 120 + 9 = Rs. 129.