On increasing the price of T.V. sets by 30%, their sale decreases by 20%. What is the effect on the revenue receipts of the shop ? Choose the correct option:
A) 4
B) 5
C) 56
D) 2
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.(130 × 80) = Rs.10400   Increase% = 4001000040010000 × 100 = 4%   4nswer: 4
<result>A</result>
On increasing the price of T.V. sets by 30%, their sale decreases by 20%. What is the effect on the revenue receipts of the shop ?