A group of people were surveyed on the how often they rode the bus every month. The table below shows the results.
Number of times riding the bus
Fewer than 20
More than 25
Number of people
(a) How many people took part in the survey?
(b) What was the total number of bus rides taken by all participants in the survey?
(c) What was the average number of rides taken on the bus per person? Round off the answer to the nearest whole number.