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mean of 100 observations is 40. The 9 ob...

mean of 100 observations is 40. The 9 observation is 30. If this is replaced by 70 keeping all other observation same, find the new mean.

A

`40.6`

B

`40.4`

C

`40.3`

D

`40.7`

Text Solution

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The correct Answer is:
B
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