Question

A sum of Rs. 9000 is in the form of denominations of Rs. 100 and Rs. 500. If the total number of notes is 50, find the number of notes of each type.

Answer 1

Step-by-step explanation:

Let number of denominations of 100 and 500 be x and y.

100x + 500y = 9000 (equation 1)

x+ y =50 (equation 2)

from equation 2, x= 50-y

In equation 1, 100x + 500y = 9000

100(50-y) + 500y = 9000

5000 -100y + 500y = 9000

400 y = 4000

y = 10

x= 50-y = 40

So Rs. 100 notes is 40 and Rs. 500 notes is 10