Question
A trademan marks his goods at 20% above the cost price. He allows his customers a discount of 8% on marked price. Find out his profit per cent.
Answer: Option A
Answer: (a)Suppose C.P. = 100On 20% above S.P. = 120On discount of 8%= $120 - 120 × 8/100$= $120 - 48/5$ = 120 - 9.6 = 110.4Gain = 110.4 - 100 = 10.4%Using Rule 8,Here, r = 20%, $r_1$ = 8%Profit or loss= ${r × (100 - r_1)}/100 - r_1$= ${20 × (100 - 8)}/100 - 8$= ${20 × 92}/100 - 8$= 18.4 - 8 = 10.4% profit
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Answer: (a)Suppose C.P. = 100On 20% above S.P. = 120On discount of 8%= $120 - 120 × 8/100$= $120 - 48/5$ = 120 - 9.6 = 110.4Gain = 110.4 - 100 = 10.4%Using Rule 8,Here, r = 20%, $r_1$ = 8%Profit or loss= ${r × (100 - r_1)}/100 - r_1$= ${20 × (100 - 8)}/100 - 8$= ${20 × 92}/100 - 8$= 18.4 - 8 = 10.4% profit
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