Successive discounts of 10% and 30% are equivalent to a single discount of __% :

Successive discounts of 10% and 30% are equivalent to a single discount of __% :
[A]40%
[B]17%
[C]37%
[D]39

37%
Equivalent Discount = x+y-\frac{x\times y}{100}
=> 30+10-\frac{30\times 10}{100} = 37\%
Hence option [C] is the right answer.

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