On purchase of 3 toys, a shopkeeper offers a discount of 10% on marked price and 1 toy free.

Even then shopkeeper earns a profit of 20%.

What is the ratio of marked price to cost price?

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On purchase of 3 toys, a shopkeeper offers a discount of 10% on marked price and 1 toy free.

Even then shopkeeper earns a profit of 20%.

What is the ratio of marked price to cost price?

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