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The mean of 10 observation is 15. If one...

The mean of 10 observation is 15. If one observation 15 is added, then find the new mean.

A

16

B

11

C

15

D

10

Text Solution

Verified by Experts

The correct Answer is:
C
Mean of 10 observations is `(Sigma x)/10=15`.
`Sigma x = 150`
If one observation 15 is added, then the sum of new observations `=150+15=165`.
`:.` New Mean `=165/(10+1)=15`
Hence, the correct option is (c).
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