The given histogram shows the frequency distribution of the speed of cars passing though at a particular spot on a highway. Study the graph and answer the question that follows.
What is the ratio of the number of cars with speed less than 60 km / h to the number of cars with speed more than 80 km / h?
1
7 : 8
2
8 : 7
3
4 : 5
4
5 : 4