Answer:
On the transporter's lorry.
Step-by-step explanation:
We have been given that there are 4 red cars and 6 blue cars parked in the car park at Ben’s workplace. On a transporter lorry travelling alongside Ben on the motorway there are 5 cars, 3 of which are red.
Let us compare both proportions to find which situation is most likely red.



Now let us find proportion of red cars on the transporter's lorry.

Upon comparing both proportion we can see,
Therefore, on the transporter's lorry red color is most likely.