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The exact mean of the 30 students' maths marks was:

A59.3
B62.0
C52.0
D47.5
Answer & Solution
Correct answer: A. 59.3
1. Multiply each mark by its frequency and add. 2. Divide by 30. 3. The mean is 59.3. _Source: syllabus Mathematics, Chapter 14, Statistics._
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