High School Statistics Practice

PARCC and Common Core Resources

Question 2: An automatic lottery ticket dispenser is used to sell tickets priced at $2 each. The table below shows the likelihood that a random customer buys a certain number of tickets.

Number of ticketsProbability
10.4
20.2
30.15
40.15
50.1
60.1


If X = the number of tickets purchased by a random customer, calculate the expected value of X.