In a bag,the ratio of the number of 2 rupee, 1 rupee and 50 paise coins is 3 : 4: 5. If the total amount in the bag is ₹250, then how many 1 rupee coins are there?

80

2 Rs  : 1 Re  : 50 p

 3     :    4    :   5

⇒ 3 x 2 : 4 x 1 : 5 x 0.5

⇒ 6 : 4 : 2.5

⇒ (6 + 4 + 2.5) units = Rs. 250,

⇒ 12.5 units = 250

⇒ 1 unit = 20

⇒ No. of 1 Re coins = 4 x 20 = 80