Question

Calculate the mean deviation about 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​

Answer 1

Answer:

i hope this is correct

Step-by-step explanation:

Find the mean deviations 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