Final answer:
The power output of the loudspeaker is the same as the power it receives, which is stated as 150 W. Thus, the correct answer is c) 150 W.
Step-by-step explanation:
The question involves calculating the power output of a 5.0-Ω loudspeaker that receives an average power of 150 W. The options given for power output are a) 30 W, b) 75 W, c) 150 W, and d) 600 W. To find the correct answer, we do not need to perform any calculations because the question explicitly states that the loudspeaker receives an average power of 150 W. This means the power output of the loudspeaker is also 150 W, as it is given that this is the power the speaker receives. Therefore, the correct answer is c) 150 W.