Mean Deviation About Mean Grouped Data (Jee Mains) | ExamDuo
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Dispersion and Variance
Hard
Mean Deviation About Mean Grouped Data
Find the mean deviation about the mean for the following data.
Marks Obtained
10-20
20-30
30-40
40-50
50-60
60-70
70-80
Number of students
2
3
8
14
8
3
2
SELECT ONE OPTION
A
12
B
10
C
11
D
9
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