Arithmetic mean is 25 and all sum of observations is 350 then number of observations are
- 14
- 24
- 15
- 16
Explanation
Given:
mean=25
the sum of all observations= 350
To find:
number of observations
Solution:
The formula for mean
Mean = sum of all observations
number of observations
Putting all the values
25= 350/number of observations
number of observations= 350/25
∴ number of observations= 14
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