The owner of a local movie theater keeps track of the number of tickets sold in each purchase. The owner determines the probabilities based on these records. Let X represent the number of tickets bought in one purchase. The distribution for X is given in the table. A 2-column table with 5 rows. Column 1 is labeled number of tickets with entries 1, 2, 3, 4, 5. Column 2 is labeled Probability with entries 0.17, 0.55, 0.20, 0.06, 0.02.

Which of the following correctly represents the probability of a randomly selected purchase having at most three tickets?

Which of the following correctly represents the probability of a randomly selected purchase having at most three tickets?
(not d)
P(X ≤ 3)
P(X < 3)
P(X ≥ 3)
P(X > 3)