In a 400-meter freestyle relay, each swimmer swims 100 meters. The times, in seconds, for 4 swimmers are approximately Normally distributed, with means and standard deviations shown below. Assume that the swimmers’ individual times are independent of each other. Use the z-table to answer the question.

A 3-column table with 4 rows. Column 1 is labeled swimmer with entries Ali, Betty, Carmen, Deena. Column 2 is labeled Mean with entries 54.2, 57.0, 55.3, 53.7. Column 3 is labeled standard deviation with entries 2.8, 3.0, 2.4, 2.5.

What is the probability that the total team time in the 400-meter freestyle relay is less than 215 seconds?
0.056
0.1665
0.8335
0.944