Answer:
0.12 is the required probability.
Step-by-step explanation:
We are given the following in the question:
A: next component brought in for repair is an audio component
B: event that the next component is a compact disc player


We have to evaluate:

0.12 is the required probability.
The answer is f because it equals 1/3 and f is 1/3
The answer is -40 but I don't remember how to calculate that, sorry.