In a bag, the number of one rupee coins is three times the number of two rupee coins. If the worth of the coins is ₹120, find the number of 1 rupee coins.
72
Let two-rupee coins = x, then one-rupee coins = 3x.
Value: 2x + 3x = 120 ⇒ 5x = 120 ⇒ x = 24.
One-rupee coins = 72.