The average of 15 papers is 50. The average of the first 8 papers is 48 and of the last eight papers is 54. Find the marks obtained in the 8th paper.

The average of 15 papers is 50. The average of the first 8 papers is 48 and of the last eight papers is 54. Find the marks obtained in the 8th paper.

• A. 66
• B. 64
• C. 58
• D. 56

 

The correct answer is option A. 66. Can you explain this answer in the comments?

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