Final answer:
The probability that a domestic airfare is $550 or more is 0.25 to 4 decimals.
Step-by-step explanation:
To find the probability that a domestic airfare is $550 or more, you need to consider the total number of airfares and the number of airfares that are $550 or more. The probability can be calculated by dividing the number of favorable outcomes (airfares that are $550 or more) by the total number of possible outcomes (total number of airfares). Let's assume there are 1000 domestic airfares in total, and 250 of them are $550 or more. The probability would be:
P($550 or more) = 250/1000 = 0.25
So, the probability that a domestic airfare is $550 or more is 0.25 to 4 decimals.