What is the combined maximum passenger capacity of both classes?

To determine the combined maximum passenger capacity of both classes, one must add the maximum capacities designated for each class. In this scenario, the total capacity is likely a straightforward summation of the two class capacities based on the configuration of the aircraft or vehicle in question.

If the combined maximum passenger capacity is stated to be 88, this indicates that the specific breakdown between classes contributes to this total. For example, one class might hold a certain number of passengers, while the other class would accommodate the remaining seats to achieve the total of 88.

Considering the other options, they do not meet the defined capacity of both classes combined, thus falling short of the actual passenger limit stipulated in the guidelines or aircraft specifications. This reinforces why the answer being 88 aligns with the total possible seating arrangements available in both classes, ensuring all seats are utilized to their maximum potential for accommodating passengers.