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Mathematics 10 Online
OpenStudy (anonymous):

The following table shows the probability distribution for a discrete random variable. X 18 22 27 30 31 35 P(X) 0.12 0.13 0.25 0.16 0.14 0.20 What is the mean of this discrete random variable. That is, what is E(X), the expected value of X? Your answer will be a decimal number. Express this number exactly

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