Marks Distribution Mean SD (Jee Mains) | ExamDuo
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Dispersion and Variance
Medium
Marks Distribution Mean SD
Given below is the frequency distribution of marks obtained by 100 students. Compute arithmetic mean and S.D.
Marks
40-49
50-59
60-69
70-79
80-89
90-99
No. of Students
4
12
25
28
26
5
SELECT ONE OPTION
A
72, 12.2
B
74, 14.2
C
76, 14.45
D
78, 12.45
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