Probability

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Question : 36 of 127

Marks: +1, -0

If two random variables

x

and yare related by

y=2-3 x

, then the SD of

y

is given by

$-3 × {SD}$ of ${x}$
$3 × {SD}$ of ${x}$ .
$9 × {SD}$ of ${x}$
$2 × {SD}$ of ${x}$ .

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