- A65
- B64.67
- C66
- D64
Step-by-Step Solution
Weight by the ratio: . (64.67 is the unweighted average.)
Answer: A) 65
Students in sections A, B and C are in the ratio 2 : 3 : 5, and their mean marks are 60, 70 and 64. What is the mean mark of all three sections together?
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