Question

The mean marks of 40 boys in a class is 60. The mean marks of 40 girls of the class is 58. The average marks of 70 students of the class is
(1) 59
(2) 58
(3) 60
(4) 58.5​

Answer 1

Step-by-step explanation:

B) 74

Description for Correct answer:

Total marks of 30 boys = 70×30 = 2100

Total marks of 20 girls = = 20×86 = 1600

Total marks of 50 students = 3700

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