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.Solution
ATQ, Let the cost price of item 'watch' and item 'ring' be Rs. '3x' and Rs. '2x', respectively Therefore, cost price of item 'keychain' = 2x × (2/5) = Rs. '0.8x' ATQ, 3x + 0.8x = 760 Or, 3.8x = 760 Or, 'x' = (760/3.8) = 200 Therefore, required selling price = 1.5 × 2x = Rs. '3x' = 3 × 200 = Rs. 600
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