Question

7. Consider a grouped frequency distribution of marks obtained, out of 100,

by 53 students, in a certain examination, as follows:
Marks: 0-10, 10-20, 20-30, 30-40, 40-50, 50-60, 60-70, 70-80, 80-90, 90-100
Number of students: 5,3,4,3,3,4,7,9,7,8

Find the mean for the above data​

Answer 1

Answer:

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