Question

20. A sum of 500 is in the form of notes of denominations of 5 and 10. If the total
number of notes is 90, find the number of notes of each type.​

Answer 1

Step-by-step explanation:

Let the number of 5 rupee notes be x,then

The number of 10 rupee notes =90−x

Then ,according to the question

5x+10(90−x)=500

5x+900−10x=500

5x=400

x=80

There are 80 notes of Rs.5 and 10 notes of Rs.10.