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Question

For each notebook, the shopkeeper gets Rs. 4 as profit and for each pen, he loses 20 paise. The total profit he made was Rs. 40. If he sold 100 pens during that period, find the profit earned on notebooks. [Assume he only sold notebooks and pens during that period; Answer in terms of a number]


A

Rs. 40

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B

Rs. 60

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C

Rs. 50

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D

Rs. 30

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Solution

The correct option is C

Rs. 60


Loss on selling 1 pen = 20 paisa = - Rs 0.2
So, loss on selling 100 pens = Rs. ((-0.2) x 100) = - Rs. 20

Total gain = Profit earned on notebooks + Loss incurred on pens

So, Profit earned on notebooks = Total gain - Loss incurred on pens

= Rs. 40 - (- Rs. 20)
= Rs. 40 + Rs. 20
= Rs. 60


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