1.

A sum of rs 800 is in the form of denomination of rs 10 and rs 20.If the total number of notes are 50, find the number of notes of each type.

Answer» let Rs 10=x
Let Rs21=y
x+y=50-(1)
10x+120y=800
x+2y=80-(2)
subtracting equation 1 from equation 2
y=30
x=20
20 notes of 10 Rs
30 notes of 20 Rs.


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