The total of 324 of 20 paise and 25 paise make a sum of Rs. 70. The no of 20 paise coins is Choose the correct choice from the following answers
A) 238 B) 277 C) 220 D) 200 E) 288

Rationale: "explanation : let the number of 20 paise coins be x . then the no of 25 paise coins = ( 324 - x ) . 0.20 * ( x ) + 0.25 ( 324 - x ) = 70 = > x = 220 . . answer : c ) 220"
Answer: C