Number of passengers
Frequency
6
0
4 The numbers of passengers in
cars and minibuses driving
past a

Number of passengers
Frequency
6
0
4 The numbers of passengers in
cars and minibuses driving
past a school gate one
morning were recorded.
The results of the survey
are shown in the table.
4
1
8
2
3
10
4
Х
2
y
The total number of vehicles surveyed was 40.
a) Calculate the frequency of the vehicles with four passengers.
b) The mean number of passengers carried in the vehicles was 2.75.
Calculate the number of passengers represented by y in the table.
c) Deduce the model num
ber of passengers carried.​