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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: NCERT Class 10 Mathematics, Chapter 14, Statistics._
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