Question

calculate the mean score
of 20 students in mathematic
test
Marks
10 - 20
20 - 30
30 - 40
40 - 50
50 - 60
No of students
2
4
7
6
1​

Answer 1

Step-by-step explanation:

mean = sum of all value

________________

number of value

I have given you formula now it will be easy for you to solve

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