Question: 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

  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)

.20

.40

.30

.10

1.00


Expected value E(X) of the number of passengers waiting at the bus stop.

  1. The probability that there is at least 1 passenger at the bus stop.
  2. The probability that there are less than 2 passengers at the bus stop.


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