Question
A shopkeeper buys toffees at the rate of 14 for 1 rupee.
At what rate (how many toffees per rupee) should he sell them to earn a 40% profit?Solution
C.P. of 14 toffees = Rs. 1
S.P. of 14 toffees = 140% of 1 = Rs. 7/5
For Rs. 7/5, toffees sold = 14
For Rs. 1, toffees sold = 10
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