Question

A bag contains rs. 1600 inthe form of rs 10 and rs 20 notes. if the ratio between the numbers of rs 10 and rs 20 notes 2:3 find the total numbers of notes in all

Answer 1

Let number of 10rs notes be X
and 20rs notes be Y

it is given that
$\frac{x}{y} = \frac{2}{3}$
so by this equation x=2y/3. -(i)

total rs is 1600
so, 10X + 20Y =1600. -(ii)
put eq (i) result in eq(ii)
now calculate....

then we get Y=60
and X=40