The arithmetic mean of 8 observations was found to be 12.5, then the sum of the observations is ___
a)100
b)120
c)130
d)140
The arithmetic mean of 8 observations was found to be 12.5, then the sum of the observations is ___
1 thought on “The arithmetic mean of 8 observations was found to be 12.5, then the sum of the observations is ___<br /><br />a)100<br /><br />b)”
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Solution:–
Arithmetic Mean of Observations = 12.5
Number of Observations = 8
✯ Arithmetic Mean = Sum of Observations÷Number of Observations
✯ Sum of Observations = Mean×Number of Observations
→ 12.5×8
→ 100
Sum of Observations = Option a. 100
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