A discount series of 10% , 15% and 20% is equal to a single discount of :

A 38.8%
B 61.2%
C 76.5%
D 23.5%

Correct Answer: 38.8%

Let, the original price = 100 Atfirst, at 10% discount the price become 100 - 10/100 × 100 = 90 Again, at 15 % discount, 90 - 15/100 × 90 = 76.5 Again, at 20% discount 76.5 - 76.5 × 20/100 = 61.2 So originally discount = 100 - 61.2 = 38.8
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