Mathematics
Medium
Question
The average marks of a class of 30 students is 40 and that of another class of 50 students is 60. Find the average marks of all the students?
A
50
B
47.5
C
59
D
52.5
✓ Official correct answer
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A
50
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B
47.5
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C
59
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D
52.5
No member explanations yet for this option.