Question

A sum of Rs.800 is in the form of denomination of Rs.10 and Rs.20 . If total no. of notes be 50 ,find the no. of nots of each type

Answer 1

let the rs.20 note = x
and rupee 10 note = 50 - x 

atq
        20x + 500 - 10x = 800
        10x = 300
     
x = 30

therefore rs.20 note = 30
and rs.10 note = 20

Answer 2

Answer:

Let the number of rupees 10 notes=x

Total no. of notes =50

No. of rupees 20 notes = 50-x

Value of rupees 10 notes=10×x

Value of rupees 20 notes=20 (50-x)

=1000-20x

A/Q

10x+1000-20 rupees=800

1000-800=10x

10x=200

x=20

°•° number of 10 rupees note =20

and number of 20 rupees note =30