Subject: General Aptitude · Chapter: Average · Exam: 2007 · Marks: · Difficulty:
The average of marks of 13 papers is 40. The average of marks of the first 7 papers is 42 and that of the last 7 papers is 35. What are the marks of the seventh paper?
Answer
Answer (as printed):
Explanation
Marks in the seventh paper = (42 × 7 + 35 × 7 – 40 × 13) = (294 + 245 – 520) = 539 – 520 = 19.
Explanation as extracted from the printed page; notation may be imperfect.