>>35235309You keep saying 2018 is more likely than 2019 without giving any actual numbers. The only way you could be saying P(2018) > P(2019) is if you're somehow saying the numbers are 1/275 and 1/365 respectively, which makes no sense.
>if not mutually exclusiveBut they ARE mutually exclusive, because the game cannot be first released in BOTH years. 1/275 is correct IF the game is 2018; 1/365 is correct IF the game is 2019; but both numbers cannot be correct at the same time.
You need to go back to school and actually learn your probability correctly.