On increasing the price of T.V. sets by 40%, their sale decreases by 20%. What is the effect on the revenue receipts of the shop ?	Choose the correct choice from the following answers:	A) 4	B) 5	C) 56	D) 12	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.(140 × 80) = Rs.11200   Increase% = 1200/10000 × 100 = 12%   Answer: 12
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On increasing the price of T.V. sets by 40%, their sale decreases by 20%. What is the effect on the revenue receipts of the shop ?