A bag contains coins of ₹1, ₹2 and ₹5 in the ratio 5 : 10 : 6 respectively. The total amount in the bag is ₹275. How many ₹5 coins are in the bag?

30 35 25 20

30

Rs 1 : Rs. 2 : Rs. 5    5   :   10   :   6 ⇒ 1 x 5 : 2 x 10 : 5 x 6 ⇒ 5 : 20 : 30 ⇒ (5 + 20 + 30) units = 275 ⇒ 55 units = 275 ⇒ 1 unit = 5 ⇒ No. of Rs. 5 coins = 6 x 5 = 30.