Question

a sum of rupees 500 is in the form of denominations of rupees 5 and rupees 10 if the total number of notes is 90 find the number of notes of each type.

Answer 1

Member since Dec 10 2008

Let the number of Rs 5 notes be x

Hence the number of Rs 10 notes be (90 − x)

Total sum of money = Rs 500

∴ 5x + 10 (90 − x) = 500

5x + 900 − 10x = 500

− 5x = 500 − 900 = −400

∴ x = 80

Hence there are 80 notes of Rs 5 and 10 notes of Rs 10.

Answer 2

Total amount =500
Let ₹5 notes be x and ₹10 notes be y
Money in the form of 5=5x
In the form of 10=10y

5x+10y=500
X+y=90

By solving this we get
X=80
Y=10