Question

Calculate the mean and the standard deviation of the following series:
Marks (Above): 0
10
20
30 4-0
50
No. of students : 100 90
75
50
25
15
60
70
5
0
[Ans. X =31, o=15.9
7. Calculate the mean and standard deviation from the following data:​

Answer 1

Answer:

hey here is your solution in above pics

pls mark it as brainliest