In an examination a pupil's average marks were 63 per paper. If he had obtained 26 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination?
Choose the correct choice:
A) 8  B) 9  C) 10  D) 14  E) 12
Let the number of papers be x. Then,   63x + 26 + 2 = 65x   = 2x = 28   = x = 14.   ANSWER:14
<result>D</result>
In an examination a pupil's average marks were 63 per paper. If he had obtained 26 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination?