In an exam, the average marks for 80 students of Class V is 35. The average of marks in section A of the class is 55 while the average of marks in section B is 30. Find the number of students in section B? A. 45 B. 50 C. 64 D. 60 Answer Workspace Report Discuss Answer with explanation Answer: Option C Explanation Total students i.e. Section A + Section B = 80 Section A = (80 – Section B) = 80 – B ∴ 80 x 35 = B x 30 + (80 – B) x 55 2800 = 30B + 4400 – 55B 1600 = 25 B B = 64 ∴ B = 64 = Number of students in section B. Workspace
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