Question

A man buys postage stamps of denominations 3 paise and 5 paise,for ₹1.00 . He buys 22 stamps in all . Find the number of 3 paise stamps.

Answer 1

Answer:

Let the 3 paise stamp be x and 5 paise be y

3x+5y = 100. --------eqn1

x+y = 22. --------eqn2

multiplying eqn2 by 5

5x + 5y = 110. --------eqn3

subtrating eqn1 and eqn2

5x + 5y = 110

3x + 5y = 100

- - -

2x = 10

x = 10/2

x = 5

we let 3 paise as a x

so the number of 3 paise is 5

Step-by-step explanation:

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