Some toffees are bought at the rate of 11 for Rs 10 &the same number at the rate of 9 for Rs 10. If the whole lot is sold at one rupee per toffee. find the gain or loss in the whole transaction.

**Given,** some toffees are bought at the rate of 11 for Rs 10 and same number at the rate of 9 for Rs 10.

⇒ c.p. of each toffee of first kind =

⇒ c.p. of each toffee of second kind =

Cost price of two toffees of different kinds =

Therefore, combined cost price of one toffee =

It is given that, selling price of 1 toffee = Rs 1

As, C. P > S.P, therefore the seller must incurred a loss given by:

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