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14.	The banker's discount on Rs.1650 due a certain time hence is Rs.165. Find the true discount and the banker's gain.
	A.  12
	B.  15
	C.  18
	D.  21

Solution

Sum =B.D x T.D/ B.D - T.D = B.D x T.D/ B.G T.D / B. G =Sum / B.D = 1650 / 165 = 10 / 1 If B.D is Rs. 11,T.D= Rs.10. If B.D is Rs.165, T.D = Rs.(10 / 11 x 165) = Rs.150. And, B.G = Rs(165 - 150) = Rs.15.

15.	The present worth of a bill due sometime hence is Rs. 1100 and the true discount on the bill is Rs.110.Find the banker's discount and the banker’s gain?
	A.  Rs.111
	B.  Rs.120
	C.  Rs.121
	D.  Rs.125

Solution

T.D = √P.W x B.G B.G = (T.D)² / P.W = Rs(110x110/1100) = Rs.11. B.D = (T.D + B.G) = Rs(110+11) = Rs.121.