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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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