Question

some toffees are bought at the rate of 11 for Rs 10 and and the same number @ 9 Rs 10 .If the whole lot is sold at o e rupees per toffee,find the gain or loss %on whole transaction .

Answer 1

CP of 1 toffee = 10/11

SP of 1 toffee = 10/9
cost price of two toffees of different kinds 10/11 + 10/9 = 200/99
therefore, combine cost price of one toffee =
1/2 X 200/99 = 100/99
It is given that, selling price of one toffee = Rs 1
As, CP > SP , therefore the seller get loss ( 100/99 ) - 1 = 1/99
% Loss = [( 1/99 )(100/99)] X 100% = 1%

Hope it helps you !