If in a class of 20 students
5 Students have scored 76 Mark's
2 students have scored 77 Mark's
8 students have scored 78 marks
Then compute the mean of the class
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Answer:
The total marks obtained by 5 students =5×76=380
Total marks obtained by 7 students =7×77=539
Total marks obtained by 8 students =8×78=624
Then total marks obtained by 20 students =380+539+624=1543
Then, mean of the class =
20
1543
=77.15
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