A sum Rs.800 is in the form of denominations of Rs.10 and Rs.20.if the total number of notes be 50,find the number of notes of each type.
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Answered by
3
let the no. of 10 rupees note be x
let the no. of 20 rupees nots be y
a.t.q
x+y=50...........[1]
10x+20y=800......[2]
by elimination method:-
x=20 and y =30
let the no. of 20 rupees nots be y
a.t.q
x+y=50...........[1]
10x+20y=800......[2]
by elimination method:-
x=20 and y =30
Answered by
5
Let no.of 10rs note be X.
Let no.of 20rs note be Y.
According to question,
10X +20Y = 800_______(1)
And,
X + Y = 50____________(2)
(1) + (2), so we get
2X +3Y = 130,________(3)
By (2), X = 50 - Y______(4)
Put the value of X in (3)
We get 2(50 - Y) + 3Y = 130,
100 - 2Y + 3Y = 130
Y = 30, and
X = 20.
HOPE THIS WILL HELP YOU
Let no.of 20rs note be Y.
According to question,
10X +20Y = 800_______(1)
And,
X + Y = 50____________(2)
(1) + (2), so we get
2X +3Y = 130,________(3)
By (2), X = 50 - Y______(4)
Put the value of X in (3)
We get 2(50 - Y) + 3Y = 130,
100 - 2Y + 3Y = 130
Y = 30, and
X = 20.
HOPE THIS WILL HELP YOU
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