Question

1. A sum of ₹ 800 is in the form of denomination of ₹ 10 and ₹ 20. If the total number of notes is 50, find the number of notes of each type. ​

Answer 1

Let the number of Rs. 10 notes be=x

The number of Rs. 20 notes =(50-x)

10x+20(50-x)=800

10x+1000-20x=800

- 10x= 800 - 1000

- 10x= - 200

x= - 200/ - 10

= 20

Hence, number of Rs. 10 notes = 20

And number of Rs. 20 notes = 50-20=30