Question

The cost price ratio of the item 'watch' to the item 'ring' is 3:2, while the cost price ratio of the item 'ring' to the item 'keychain' is 5:2. If the total cost price of the 'watch' and 'keychain' combined is Rs. 760, calculate the selling price of the 'ring' when it is sold at a 50% profit.

A 550
B 650
C 600
D None of these
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