Question

70 coins of 10-paise and 50-paise are mixed in a piggy bank. If the total
value of the money in the piggy bank is Rs.19, find the number of each type
of coins. What is use of saving money?

Answer 1

10(70−y)+50y=1900700−10y+50y=190040y=1900−70040y=1200y=120040=30⇒y=30

And we have x=70−y

x=70−39=40⇒x=40