Suppose the Round-Trip Airfare Between Philadelphia and Los Angeles a Month

Suppose the round-trip airfare between Philadelphia and Los Angeles a month before the departure date follows the normal probability distribution with a mean of $387.20 and a standard deviation of $68.50. The interval around the mean that contains 95% of the airfares is -------.

A) $318.70, $455.70
B) $284.45, $489.95
C) $250.20, $524.20
D) $352.95, $421.45