Find the expected value of each random variable shown. а) х 2 3 4 P(X = x) 0.2 0.5 0.3 b) x 100 200 300 400 P(X = x) 0.3 0.1 0.4 0.2 a) The expected value is.

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Find the expected value of each random variable shown.
а) х
P(X = x)
3
4
0.2
0.5
0.3
+
300
b) x
P(X = x)
100
200
400
0.3
0.1
0.4
0.2
a) The expected value is.
(Type an integer or a decimal. Do not round.)
Transcribed Image Text:Find the expected value of each random variable shown. а) х P(X = x) 3 4 0.2 0.5 0.3 + 300 b) x P(X = x) 100 200 400 0.3 0.1 0.4 0.2 a) The expected value is. (Type an integer or a decimal. Do not round.)
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