Discussion of Question with ID = 055 under Profit-and-Loss

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Question

Articles are purhcased at the rate of 7 articles for Rs. 3. They are sold at 3 articles for Rs. 7. The profit earned in rupees by selling 21 articles would be?

A

Rs. 40.

B

Rs. 41.

C

Rs. 42.

D

Rs. 39.

Soln.
Ans: a

Let 21 articles be purchased and then sold back. Cost of 21 articles = $3/7$ × 21 = Rs. 9. Sale of 21 articles = $7/3$ × 21 = Rs. 49. The profit is 49 - 9 = Rs. 40


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