Calculate mean
Marks
0-9
10-19
20-29
30-39
40-49
50-59
no. of students
3
8
14
21
9
5
A) 13.14 B) 31.17 C) 27.5
D)28.3
Answers
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1
Answer:
mean marks
3+8+14+21+9+5/6
60/6
=10
no such option is given
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