A bag contains an equal number of one rupee, 50 paise and 25 paise coins respectively. If the total value is 175, how many coins of each type are there?
Pick one:
A) 20 coins  B) 30 coins  C) 50 coins  D) 100 coins  E) none of these

Rationale: "let number of each type of coin = x . then , 1 × x + . 50 × x + . 25 x = 175 ⇒ 1.75 x = 175 ⇒ x = 100 coins answer d"
Answer: D