A bag contains coins of denomination ₹1, ₹2 and ₹5 in the ratio of 4 : 5 : 8. If the total value of these coins is ₹432, then what is the number of ₹2 coins?

40

Here,

Rs. 1 : Rs. 2 : Rs. 5

   4   :   5     :   8

⇒ 1x 4 : 2 x 5 : 5 x 8

⇒ 4 : 10 : 40

⇒ (4 + 10 + 40) units = 432

⇒ 54 units = 432

⇒ 1 unit = 8

⇒ No. of Rs. 2 coins = 5 x 8 = 40.