Answer: Hence, our required probability is 0.001077.
Explanation:
Since we have given that
Number of red cars = 6
Number of silver cars = 9
Number of black cars = 3
Total number of cars = 6+9+3=18
We need to find the probability that 3 cars are red and 3 are black.
So, the required probability is given by

Hence, our required probability is 0.001077.