The frequency table below summarizes the times in the last month that patients at the emergency room of a small-city hospital waited to receive medical attention.

Waiting time Frequency Less than 10 minutes 5 At least 10 but less than 20 minutes 24 At least 20 but less than 30 minutes 45 At least 30 but less than 40 minutes 38 At least 40 but less than 50 minutes 19 At least 50 but less than 60 minutes 7 At least 60 but less than 70 minutes 2 Which of the following represents possible values for the median and mean waiting times for the emergency room last month?

(a) median = 27 minutes and mean = 24 minutes

(b) median = 28 minutes and mean = 30 minutes

(c) median = 31 minutes and mean = 35 minutes

(d) median = 35 minutes and mean = 39 minutes

(e) median = 45 minutes and mean = 46 minutes