Deterime whether the two events are disjoint a ARandomly sel

Deterime whether the two events are disjoint:

(a). A.Randomly selecting a Corvette from the Chevrolet assembly line and getting one that is free of defects.B. Randomly selecting a Corvette from the Chevrolet assembly line and getting one with a dead battery.

(b). Randomly selecting a movie with rating of R. B. Randomly selecting a movie with rating of four stars.

Solution

a) not disjoint, specifically B is a part of A

b) disjoint . because the rating scale is different