Question
Find the single discount equivalent to a series discount of 20% , 10% and 5% .
Answer: Option D
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Let marked price be Rs. 100
Then , Net S.P. = 95% pf 90% of 80% of Rs. 100 = Rs. `(95/100 xx 90/100 xx 80/100 xx 100)` = Rs. 68.40
`:.` Required discount = (100 - 68.40)% = 31.6%
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