Final Answer:
The probability that a car is mainly white, covering the largest portion, is 0.24 (Option a).
Step-by-step explanation:
The owner must identify the color covering the largest portion of the car.
The probabilities for mainly white, mainly silver, and mainly black are given as 0.24, 0.22, and 0.19, respectively.
Compare the probabilities to determine which color has the highest probability.
The highest probability is 0.24, which corresponds to mainly white.
Therefore, the probability that a car is mainly white, covering the largest portion, is 0.24, confirming Option a as the correct answer.