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Question

# A man buys postage stamps of 25 paise and 50 paise denominations for Rs.10. He buys 25 stamps in all. Find the number of 25 paise stamps he purchased.

A

5

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B

10

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C

20

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D

25

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Solution

## The correct option is B 10 Let the number of 25 paise stamps be x. And number of 50 paise stamps be y. x + y = 25 ….(i) 25x + 50y = 1000 ⇒ x + 2y = 40 ….(ii) On subtracting (i) from (ii) y = 15 On substituting value of y in (i), we get x + 15 = 25 ⇒ x = 25 – 15 = 10 Number of 25 paise stamps = 10 and Number of 50 paise stamps = 15

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