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Average height & variance of {5} students in a class is {150}

Question

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

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Average height & variance of

5

students in a class is

150

and

18

respectively. A new student whose height is

156 c m

is added to the group. Find new variance. (a)

20

(b)

22

(c)

16

(d)

14

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Question Text

Average height & variance of

5

students in a class is

150

and

18

respectively. A new student whose height is

156 c m

is added to the group. Find new variance. (a)

20

(b)

22

(c)

16

(d)

14

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