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Question

Find the single discount equivalent to a series of discounts of 20%,10% and 5%?

A
35%
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B
25%
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C
31.6%
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D
36%
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Solution

The correct option is C 31.6%
Let MP be 100. Then
Net SP =(1005)%of(10010)%of(10020)%of100
=95%of90%of80%of100
=(95100×90100×80100×100)=68.40
Required discount =(10068.40)%=31.6%

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