Determining probability-random variables

Reference no: EM13102570

Let the random variable X denote the number of emergency calls received by the campus police office each day. The probability mass function of X is given by:

X P(X)

0 0.75

1 0.05

2 0.10

3 0.05

4 0.05

1.00

a) Find the expected value of X

b) Variance of X

c) Standard deviation of X

Reference no: EM13102570

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