CAT Exam General Ability General Knowledge

Rehman buys few apples at 15 for a rupee and the same number of apples at 20 a rupee.He mixes the two lots and sells then at 35 for 2 rupees .What is his gain or loss perccentage?

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total cost ::= 20+15=35 for 2 rupees
total sell price ::= 35 for 2 rupees..so no profit or loss
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neither gain nor loss
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No profit no loss
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CAT Other Question

After allowing a discount of 11.11%,a trade still makes a gain of 14.28%.At how much percentage above the cost price does he mark his goods? Sonu gets a jewellery made of alloy of copper and silver. The alloy with a weight of 8kg contains p percent of copper. What piece of a copper-silver alloy containing 40% of silver must be alloyed with the first piece in order to obtain a new alloy with the minimum percentage of a copper if the weight of the second piece is 2Kg?