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What is the expected value for the random variable X shown below? x 100 200 300 400 P(X=x) 0.1 0.2 0.5 0.2 280 290 It

What is the expected value for the random variable X shown below?

x	100	200	300	400
P(X=x)	0.1	0.2	0.5	0.2

280

290

It cannot be determined from the given information

300

200

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