Multiple choice

In a school, 85 boys and 35 girls appeared in a public examination.The mean marks of boys were 40 whereas, the mean marks of girls were 60. Find the average marks of the school.

  1. 37.50

  2. 45.83

  3. 46

  4. 47

  5. 48.53
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B Correct answer
Explanation

The total marks are (85 * 40) + (35 * 60) = 3400 + 2100 = 5500. The total number of students is 85 + 35 = 120. The average is 5500 / 120 = 45.833.

AI explanation

Using the weighted average method, the average marks of the school are calculated as ((85 * 40) + (35 * 60)) / (85 + 35). This gives (3400 + 2100) / 120, which equals 5500 / 120. The result is 45.83.

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