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If mean and standard deviation of 5 obse...

If mean and standard deviation of 5 observations `x_1,x_2, x_3,x_4,x_5` are 10 and 3 respectively, then the variance of 6 observations `x_1, x_2,..., x_5` and -50 is equal to

A

`586.5`

B

`507.5`

C

`582.5`

D

`509.5`

Text Solution

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The correct Answer is:
B
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