Multiple choice

The average score of two sections is 28. The average score of section A is 30, in which there are 25 students, If there are 20 students in section B then the average score of section B is

  1. 25.5

  2. 27.5

  3. 29

  4. 33
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A Correct answer
Explanation

Total students = 25 + 20 = 45. Total score = 45 * 28 = 1260. Section A total = 25 * 30 = 750. Section B total = 1260 - 750 = 510. Section B average = 510 / 20 = 25.5.

AI explanation

Using the formula for total score, the sum of scores for both sections combined is 45 times 28 = 1260. The total score for section A is 25 times 30 = 750. The total score for section B is 1260 minus 750 = 510. The average score of section B is 510 divided by 20, which equals 25.5.

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