Answer:
The correct answer is third option 3 : 4
Step-by-step explanation:
It is given that,Jamaal has 20 models of planes and cars
Also he has three times as many cars as planes
Let 'x' be the number planes.
Then number of cars = 3x
Total number of models = x + 3x = 4x
To find the ratio of his cars to total models
cars : total models = 3x : 4x
= 3 : 4
Therefore the correct answer is third option 3 : 4
