Question

If the variance of 1,2,3,4,…………,10 is 99/12 , then S.D. of 3,6,9,12,………..,30 is *
a.
$3 \div 2 \sqrt{33}$
b.
$3 \times 2 \sqrt{99}$
c.
$\sqrt{99 \div 12}$
d.
$3 \sqrt{3 \div 2}$


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Answer 1

Answer:

I didnot know the answer please sorry