On decreasing the price of T.V. sets by 30 % its sale is increased by 20 %. What is the effect on the revenue received by the shopkeeper?

A. 10 % increase
B. 10 % decrease
C. 16 % increase
D. 16 % decrease
Let price = Rs. 100, Sale = 100
Then Sale Value = Rs. (100 × 100) = Rs. 10000
New Sale Value = Rs. (70 × 120) = Rs. 8400
Decrease % = (1000/10000 x 100) % = 16 %