On increasing the price of T.V. sets by 60%, their sale decreases by 20%. What is the effect on the revenue receipts of the shop ?
Choices
A) 4 B) 5 C) 56 D) 28 E) 7
Explanation:   Let the price be = Rs.100, and number of units sold = 100   Then, sale value = Rs.(100 × 100) = Rs.10000   New sale value = Rs.(160 × 80) = Rs.12800   Increase% = 2800/10000 × 100 = 28%   Answer: 28
<result>D</result>
On increasing the price of T.V. sets by 60%, their sale decreases by 20%. What is the effect on the revenue receipts of the shop ?