Question

A man buys postage stamps of denomination 25paise and 50paise for

Rs 10/-. He buys 28 stamps in all. Find the number of 25paise stamps

bought by him.​

Answer 1

Answer:

16 is the answer

Step-by-step explanation:

Let the man buys x 25 paisa stamps and y 50 paisa stamps. Then

x+y=28 .........(1)

and 0.25x+0.5y=10

or   $\frac{1}{4} x +\frac{1}{2} y =10$

or $\frac{x+2y}{4} =10$

x+y=40 .........(2)

Subtract equation (1) from equation (2)

x+2y=40

+x+y=28

$\frac{(-)(-)(-)}{y=12}$

∴x=28−12=16