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In a sample of 1200 U.S. adults, 217 dine out at a restaurant more than once per week. Two U.S. adults are selected at random from the population of all U.S. adults without replacement. Assuming the sample is representative of all U.S. adults, complete parts (a) through (d).
(a) Find the probability that both adults dine out more than once per week.
(b) Find the probability that neither adult dines out more than once per week.
(C) Find the probability that at least one of the two adults dines out more than once per week.
(d) Which of the events can be considered unusual? Explain. Select all that apply.
A. None of these events are unusual.
B. The event in part (C) is unusual because its probability is less than or equal to 0.05.
C. The event in part (b) is unusual because its probability is less than or equal to 0.05.
D. The event in part (a) is unusual because its probability is less than or equal to 0.05.