Question

Rupees 25 paise and 20 paise has a sum of 71rs of 324 coins fine the 20 paise coins

Answer 1

Let the number of 20-paise coins be x.
Then, number of 25-paise coins = (324 - x)
∴ 0.20 × x + 0.25 (324 - x) = 71
20x + 25 (324 - x) = 7100
5x = 1000
x = 200
Hence, number of 20-paise coins = 200