The discrete random variable X is the number of passengers waiting at a bus stop. The table below shows the probability distribution for X. What is the expected value E(X) for this distribution? X 0 1...

The discrete random variable X is the number of passengers waiting at a bus stop. The table below shows the probability distribution for X. What is the expected value E(X) for this distribution?

X          0         1        2         3    TOTAL

P(X)    .40      .30     .20      .10    1.00

Multiple Choice

a. 1.1

b. 1.0

c. 1.7

d. 1.9