Question

A lady has 25-P and 50P coins in her purse .if in all she has 80 coins totalling Rs. 25,how many coins of each kind does she have?
Please don't answer it directly kindly solve it.
This is a question of linear equation.

Answer 1

Let the no. Of 25p coins be x and 50p coins 40-x
Value of 25p coins = 25x
Value of 50p coins = 50(40-x)
=2000-50x
Now,
According to question
25x + 2000-50x = 12.50 * 100
-30x =1250-2000
-30x= -750
30x=750
X = 750/30
X= 25

Now no. Of 25p coins= 25
No. Of 50p coins= 40-25
= 15