Question

a sum of rs500 is in the form of 5rupee and 10 rupees notes. if the total number of notes be 75,find the number of notes of each type

Answer 1

Let the no. Of 10rs notes be x.
So 5rs notes will be 75-x

x X 10 + 5(75 - x) = 500
10x + 375-5x=500
5x = 125
x = 25