Answer:
Option A is correct.
Step-by-step explanation:
No of white cars: 25
No of blue cars : 17
Total number of white and blue cars = 25 + 17 = 42
No of silvers cars: 21
No of red cars: 9
Total number of silver and red cars = 21+9 = 30
No of white and blue cars more than silver and red cars
=Total number of white and blue cars - Total number of silver and red cars
=42 - 30
= 12 cars
So, Option A is correct.
