Random variable X has the following probability distribution.
x 0 1 3 4 5 6
P .X D x/ 0.1 0.1 0.3 0.2 0.1 0.2
(a) Find P .3 X 5/. (3)
(b) Find E .X/: (5)
(c) Find V ar .X/ (7)
Check
(a)
(b)
(c)
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