Question
If on a marked price, the difference of selling prices with a discount of 30% and two successive discounts of 20% and 10% is Rs.72, then the marked price (in rupees) is
Answer: Option C
Answer: (c)Using Rule 5,Let the marked price be Rs.x.In case I, SP = Rs.${70x}/100$Single discount equivalent to successive discounts of 20% and 10%.= $(20 + 10 - {20 × 10}/100)$% = 28%S.P. in this case = ${72x}/100$${72x}/100 - {70x}/100$ = 72${2x}/100 = 72$$x = {72 × 100}/2$ = Rs.3600
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Answer: (c)Using Rule 5,Let the marked price be Rs.x.In case I, SP = Rs.${70x}/100$Single discount equivalent to successive discounts of 20% and 10%.= $(20 + 10 - {20 × 10}/100)$% = 28%S.P. in this case = ${72x}/100$${72x}/100 - {70x}/100$ = 72${2x}/100 = 72$$x = {72 × 100}/2$ = Rs.3600
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