Question

A bag contains a number of 10 paise, 20 paise, 25 paise coins in the ratio of 7:4:3. If the money value comes to be Rs. 90, the number of 25 paise coins in the bag is

Answer 1

Let a common multiple be x

As per given information

total amount = Rs 90

$=7\times 10\times x+20\times 4\times x+3\times 25\times x$

$=70x+80x+75x$

$=225x$ paise

$\therefore 9000=225x...$ $\because Rs90=(90\times 100)$ paise

$\therefore x=\frac{9000}{225}=40$

$\therefore$ No of 25 paise $=3x=\frac{3\times 9000}{225}$

$=3\times 40$

$=120$