The simple interest and the true discount on a certain sum for a given time and at a given rate are Rs. 88 and Rs. 80 respectively. The sum is:  Choose the correct choice from the following choices
A) 880 B) 1450 C) 1600 D) 1800 E) None
Sol.   Sum = S.I. * T.D. / (S.I)-(T.D.) = 88 * 80 / (88 - 80) = Rs.880.   880nswer 880
<result>A</result>
The simple interest and the true discount on a certain sum for a given time and at a given rate are Rs. 88 and Rs. 80 respectively. The sum is: