If the true discount on a certain sum due 6 months hence at 15% is Rs. 120, what is the banker'* discount on the same sum for the same time and at the same rate?
B.G. = *.I. on T.D.
= Rs.(120 x 15 x 1/2 x 1/100)
= Rs. 9.
(B.D.) - (T.D.) = Rs. 9.
B.D. = Rs. (120 + 9) = Rs. 129.
