The present worth of a certain sum due sometime hence is Rs. 3400 and the true discount is Rs. 340. The banker's gain is:  Choices
A) Rs. 21  B) Rs. 17  C) Rs. 18  D) Rs. 34  E) None of these
Explanation :   BG = (TD)2/PW=(340)2/3400=340 × 340/3400 = 340/10 = Rs. 34 Answer : Option Rs. 34
<result>D</result>
The present worth of a certain sum due sometime hence is Rs. 3400 and the true discount is Rs. 340. The banker's gain is: