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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 ?

(1) `3a^2-26 a+55=0`
(2) `3a^2-32 a+84=0`
(3) `3a^2-34 a+91=0`
(4) `3a^2-23 a+44=0`

A

`3a^(2)-23a+24=0`

B

`3a^(2)-26a+46=0`

C

`3a^(2)-32a+28=0`

D

`3a^(2)-34a+45=0`

Text Solution

Verified by Experts

The correct Answer is:
C
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