Question

Question 82

In a bag, the number of one rupee coins is three times the number of two rupees coins. If the worth of the coins is Rs. 120, find the number of 1 rupee coins.

Answer 1

Let the number of two rupee coins be y. Then, the number of one rupee coins is 3y.
Total money by two rupee coins $=2\times y=2y$

Total money by one rupee coins $=1\times 3y=3y$
So, the equation formed is
2y + 3y = 120 [given]
$\Rightarrow 5y=120\Rightarrow \frac{5y}{5}=\frac{120}{5}\left[dividingbothsidesby5\right]\Rightarrow y=24$
$\therefore$ Number of two rupee coins = y = 24 and number of one rupee coins = 3y = $3\times 24=72$