Discussion
The average marks of 32 boys of section A of class X is 60 whereas the average marks of 40 boys of section B of class X is 33. The average marks for both the sections combined is:
Answer: B
This is a weighted average problem.
Total marks for section A = 32 × 60 = 1920.
Total marks for section B = 40 × 33 = 1320.
Combined total marks = 1920 + 1320 = 3240.
Combined total students = 32 + 40 = 72.
Combined average = \(\frac{3240}{72} = 45\).
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