Question: The random variable X has the discrete probability distribution shown as below. P(X-x) | X 0.1 | -2 0.2 | -1 0.45 | 0 n/a

The random variable X has the discrete probability distribution shown as below.

P(X-x) | X

0.1 | -2

0.2 | -1

0.45 | 0

n/a | 1

0.1 | 2

(a) Find the probability P(X-1)

(b)Find the probability P(-1 X < 1)

(c)Find the mean of X

(d) Find the variance and the standard deviation of X.

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