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TheNightKing
By selling 12 toffees for a dollar, a shopkeeper loses 20%. In order to gain 20% in the transaction, he should sell the toffees at the rate of how many toffees for a dollar?
(a) 8
(b) 6
(c) 4
(d) 3
(e) 10

Please refer to my attachement. I hope it is clear guys ! :
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toffee.JPG
toffee.JPG [ 93.28 KiB | Viewed 5314 times ]

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Simply, When 12 toffe sold for 1 doller shopkeeper loses 20%. So this price is actually 80%.
We have to make it 120%

Therefore, \(\frac{12*(100-20)}{(100+20)}\)
\(= \)\(\frac{12*80}{120}\)
\(= 8\)

Answer is A
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Hello from the GMAT Club BumpBot!

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