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If the standard deviation of the numbers...

If the standard deviation of the numbers 2,3,a and 11 is 3.5, then which of the following is true?

A

`3a^(2)-32a+84 =0`

B

`3a^(2) -34a +91=0`

C

`3a^(2)-23a +44=0`

D

`3a^(2)-26a +55=0`

Text Solution

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The correct Answer is:
A
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