The total of 324 of 20 paise and 25 paise make a sum of Rs. 71. The no of 20 paise coins is :  Pick:
A) 50  B) 100  C) 150  D) 200  E) 250
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) = 71 =&gt; x = 200.   Answer: 200
<result>D</result>
The total of 324 of 20 paise and 25 paise make a sum of Rs. 71. The no of 20 paise coins is :