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The table below shows the probability distribution of the random variable X. a . Find the mean of the random variable. b . Obtain the

The table below shows the probability distribution of the random variable X.

a. Find the mean of the random variable.

b. Obtain the standard deviation of the random variable.

x

1

2

3

P(X=x)

0.3

0.4

0.3

a. Find the mean of the random variable.

=

(Round to two decimal places asneeded.)

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