Has a FIBA World Cup game ever ended 75-33?
Exactly once. On September 15, 2018, Angola beat Chad 75-33, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 75-33 in league history.
That makes 75-33 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 76-33 has happened never and 75-34 has happened never.