Multiple choice

The average marks of a student in seven subjects is 41. After re-evaluation in one subject the marks were changed to 42 from 14 and in remaining subjects the marks remain unchanged. What is the new average marks?

  1. 45

  2. 44

  3. 46

  4. 47
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A Correct answer
Explanation

Initial sum = 7 * 41 = 287. Change in marks = 42 - 14 = 28. New sum = 287 + 28 = 315. New average = 315 / 7 = 45.

AI explanation

Using the average formula, the total increase in marks from the re-evaluation is 42 - 14 = 28. Divide this increase by the seven subjects to find the increase in the average: 28 divided by 7 equals 4. Adding this to the old average gives 41 + 4 = 45, the new average.

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