1
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Question

# A shopkeeper bought oranges at the rate of 7 for 10 rupees and sold them at a profit of 40 per cent. How many oranges would he sells for 10 rupees?

A
9
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B
5
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C
6
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D
4
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Solution

## The correct option is A 5Let's solve the problem on saved quantity( not on price).saved quantitysold quantity=40%⟹x(7−x)=0.4⟹x=2Hence he saved 2 oranges and sold 5 oranges in 10 rupee.ALTERNATE:−Let us assume person buy 7 orangeHis cost of 7 orange =10As he wants 40% profit ,His selling price for 7 orange will be =10+40% of 10=14Selling price of one orange =147=2In 10 rupee number of orange he will sell =102=5

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