Find the difference of amount if 40% discount is given on Rs. 500 and two consecutive discount 30% and 10% are given on the same amount.

Answer: Option A

40% discount on 500 = $$\frac{40\times 500}{100}$$  = Rs. 200
Two successive discount on 500,
= 30% of 500 + 10% of (500 - 30% of 500)
= 150 + 10% of 350
= 150 + 35 = Rs. 185
Difference in Discount = 200 - 185 = Rs. 15