Solution:
Given:
The figure is:
(the first photo)
To find:
The probability of event A.
Step-by-step explanation:
Consider the given figure,
(the second photo)
We know that,

The number of favorable outcomes = 18
The total number of outcomes = 18 + 12 + 6 = 36
Therefore,
The probability of event A is


Final answer:
The probability of event A is 0.50.