F, is empty. In words, this means that E and F have no outcomes in common, so it is impossible for both E and F to occur simultaneously.
F = {2, 4, 6, 8, 10}.
Choice B: Since no exercise can be simultaneously in one of the named categories and in neither of them, the intersection of E and F is empty and so the events are mutually exclusive.
Choice C: Since 11 and 13 are odd, and no exercise can be both even-numbered and odd-numbered, the events are mutually exclusive.
Choice D: Since F
E, and since F is non-empty (all the exercise sets contain applications), the intersection is non-empty, so the events are not mutually exclusive.
(To review events and operations on events, go back two tutorials to Unit 6.1 by pressing the "prev" button on the sidebar twice.)