The Mean Of 5 Observations Is 10. A New Observation 10 Is Added, Then Mean Of 6 Observation Is: - Testpoint

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The mean of 5 observations is 10. A new observation 10 is added, then mean of 6 observation is:

5
10
15
None of these

Explanation

The mean of 5 observations is 10.

This means the sum of the 5 observations is:

$Sum of 5 observations = Mean \times Number of observations = 10 \times 5 = 50$

Now, a new observation (10) is added. The new sum becomes:

$New sum = 50 + 10 = 60$

The new mean of the 6 observations is:

$New mean = New sum/$ Number of observations

=660

=10

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