(3) Suppose the number of 25paise coins = xTherefore, the number of 50paise coins = 40 – xAccording to question,25 × x + 50 × (40 – x) = 1275 ⇒25 x + 2000 – 50x = 1275 ⇒ 25 x = 2000 – 1275 ⇒ 25 x = 725 ∴ x =
725
25
= 29Number of 50 paise coins = 40 – x = 40 – 29 = 11