Section A has 25 students with an average score of 76. Section B has 35 students with an average score of 64. The combined average score of all students is :
None of the above
Combined average = (total score of both sections) ÷ (total number of students).
Total of Section A = \( 25 \times 76 = 1900 \); total of Section B = \( 35 \times 64 = 2240 \).
Combined average = \( \frac{1900 + 2240}{25 + 35} = \frac{4140}{60} = 69 \).
Check: \( 69 \times 60 = 4140 \). Since 69 is not among 67, 75, 72 and 68, none of the listed values is correct.
Hence, None of the above.
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