a) Rs. 20
b) Rs. 10
c) Rs. 15
d) Rs. 0
Answer: c
Explanation: 40% discount on 500 = $$\frac{{40 \times 500}}{{100}}$$ = Rs. 200
Two successive discount 30% and 10% on 500 would be
500 ===30% discount ⇒ Rs. 350
350 ===10% discount = 315
Total discount in first case = Rs. 200
Total discount in second case = 500 – 315 = Rs. 185
difference = Rs. 15
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