Question

Plz answer the question no. 11

Answer 1

Let no. Of 10 rupee notes be
and 100 rupee notes be y
Now,
x = 2y
Also,
10x + 100y = 1200
So,
x = 120-10y
So, 2y = 120-10y
y = 60-5y
6y=60
y=10
So, X=20
Now,
New amount=10*20/2+100*10
=100+1000
=1100rupees

Answer 2

let notes of 100 be x
now notes of 10 will be 2x
100x + 10× 2x = 1200
120x = 1200
x = 10 , notes of 100 = 10
notes of 10 = 20
half of 10 notes + notes of 100
200/2 + 1000
100+ 1000
1100
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