Question

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

Answer:

5 Rs notes = 80 , 10 Rs notes =10

Step-by-step explanation:

from given condition :

5x+10y=500-----1

= x+2y=100

and

x+y=90------2

Subtraction eqn 2 from 1 we get,

(y=10)

putting y=10 in equation 2 we get,

x+10=90

x=80

Answer 2

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.