Amount bag = Rs 90 = 9,000 Ratio of 50 paise, 25 paise and 10 paise coins = 2 : 3 : 5. Number of 50 paise coins = 2x Number of 25 paise coins = 3x Number of 10 paise coins = 5x According to the question, 50(2x)+25(3x)+10(5x)=9,000 100x+75x+50x=9,000 225x=9000 x=40 Number of 25 paise coins in bag = 3x = 3 × 40 = 120