Question
Some toffees were bought at rate of 11 for Rs10 and same
number at the rate of 9 for Rs10. If the whole lot was sold at one rupee per toffee, then gain% or loss% in the whole transaction?Solution
No. of toffee Price CP1 11 10 11 
9 = 99 10 9 = 90 CP2 9 10 9 11 = 99 10 11 = 110 Final CP 198 Rs. 200 SP = 198 toffees SP of Rs. 1 each = SP of Rs. 198 Loss = Rs. 2 Loss% = 2/200 100 = 1%
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