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Average height & variance of 5 students ...

Average height & variance of `5` students in a class is `150cm` and `18cm^2` respectively. A new student whose height is `156 cm` is added to the group. Find new variance(in cm). (a) `20` (b) `22` (c) `16` (d) `14`

A

22

B

20

C

16

D

18

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The correct Answer is:
B
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