How many passengers can be carried if the fuselage is configured as all passenger and combination?

In this question, the goal is to determine the passenger capacity of an aircraft's fuselage when configured for all-passenger use and in a combination layout. The first number represents the maximum number of passengers in an all-passenger configuration, while the second number indicates the capacity in a combination configuration, which typically includes both passengers and cargo.

The option indicating 121 passengers in the all-passenger layout and 69 in the combination layout reflects a balance that is often seen in aircraft designed for versatile use. Aircraft designed for all-passenger configurations usually prioritize maximum seating efficiency and comfort, allowing for a higher number of seated passengers. When the configuration shifts to a combination layout, the need for space accommodating cargo limits the available seating, which explains the reduced figure of 69 in this configuration.

The other options do not accurately represent common configurations seen in aircraft designs that focus on both passenger comfort and cargo flexibility. For example, 150 or more in an all-passenger configuration tends to be indicative of high-density seating which is typically not practical for most commercial operations. Similarly, passenger numbers in the combination layout across other options do not follow the typical design philosophy, which emphasizes effective utilization of space while still maintaining adequate passenger capacity.

Therefore, 121 and 69 is