Given that the random viriable X has mean µ = 90 and SD e= 15, find the mean and SD of each of the following random variables that are defined from X. (a) X/3 (b) 2X-40 (c) X+7 (d) X-X (Simplify your answers.)

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Given that the random viriable X has mean = 90 and SD e= 15, find the mean and SD of each of the following random variables that are defined from X.
(a) X/3
(b) 2X - 40
(c) X+7
(d) X-X
(Simplify your answers.)
Transcribed Image Text:Given that the random viriable X has mean = 90 and SD e= 15, find the mean and SD of each of the following random variables that are defined from X. (a) X/3 (b) 2X - 40 (c) X+7 (d) X-X (Simplify your answers.)
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