Correct Answer: 150
Explanation:
Ratio of their values = 1/4 : 2/10 : 3/20 = 5 : 4 : 3 ∴ Value of 5 paise coins =Rs. (30 x 3/12) = Rs. 7.50 ∴ Number of 5 paise coins = 750/5 = 150