Question

A sum of 800is in the form of denominations of 10 and 20.if the total number of notes is 50,find the number of notes of each type

Answer 1

Step-by-step explanation:

Let no of 10 rupee notes be 'x',

no of 20 rupee notes be ' y'

10x+20y = 800............(1)

x+y=50........................(2)

solve (1) and(2)

10x+20y = 800

10(x+y=50)

(-) (-) (-)

10y=300

y=30

sub y in 2

x+30=50

x=20

No of 10 rupee notes=20

No of 20 rupee notes=30

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