Geometry

Question Analysis
This question involves using a frequency table to calculate probability.
The main focus is on understanding the relationship between frequency, total frequency, and probability, and also on using the concept of complementary probability.

Key Concept Explanation
Probability = (Frequency of the event) / (Total frequency).
The probability of an event not occurring is 1 - P(event occurring).

Step-by-Step Solution
First, find the total number of cars: 45.
The probability that a car is blue is P(blue)=15 / 45 = 1/3.
The probability that a car is not blue is 1 - 1/3 = 2/3.
Another way is to find the sum of the frequencies of non - blue ...