Here's a couple of HKA style tech questions for you.
When should you rotate?
a. At VR + 40
b. At VR
If you have dispatched with one pack inop as an MEL item and the other pack fails in the cruise, what would you do?
a. Cancel the ECAM and continue to fly level until the aircraft depressurises.
b. Initiate an emergency descent.
If you answered b to both, you stand a good chance. Because you're doing better than the pilots they have employed so far!