Final answer:
The duration of the randomly selected class is approximately 53.5 minutes.
Step-by-step explanation:
To find the duration of the randomly selected class, we need to find the value of 'c' where P(x > c) = 0.292. Since the duration of the class follows a continuous uniform distribution between 49.2 and 55.5 minutes, the probability that the duration is longer than a certain number of minutes is given by (55.5 - c) / (55.5 - 49.2) = 0.292. Solving this equation for 'c', we get c = 53.5321. Therefore, the duration of the randomly selected class is approximately 53.5 minutes.