A money box contains ₹1, ₹2 and ₹5 coins in the ratio $5 : 3 : 2$ by number. The total value of the coins is ₹210. How many ₹2 coins are there?

Explanation

1. 01

   Take the coins as 5x, 3x and 2x.

2. 02

   Value = $1 \times 5x + 2 \times 3x + 5 \times 2x = 21x$ rupees.

3. 03

   $21x = 210$ gives $x = 10$, so ₹2 coins = $3 \times 10 = 30$.