A bag contains 1-rupee, 50-paise, and 25-paise coins in the ratio 5 : 6 : 7. If the total amount is ₹390, then the number of 25-paise coins is:

Explanation

• Ratio of coins = 5x : 6x : 7x.
• Total value in rupees:
5x(1.00) + 6x(0.50) + 7x(0.25) = 390
5x + 3x + 1.75x = 9.75x = 390 ⇒ x = 40
• Number of 25-paise coins = 7x = 7 × 40 = 280 (option 3).