For a recent evening at a small, old-fashioned movie theater,30%of the moviegoers were female and70%

were male. There were two movies playing that evening. One was a romantic comedy, and the other was a World War II film. As might be expected, among the females the romantic comedy was more popular than the war film:70% of the females attended the romantic comedy. Among the male moviegoers the romantic comedy also was more popular:50% of the males attended the romantic comedy. No moviegoer attended both movies.

LetF denote the event that a randomly chosen moviegoer (at the small theater that evening) was female and (line on top of )F denote the event that a randomly chosen moviegoer was male. Let R denote the event that a randomly chosen moviegoer attended the romantic comedy and (line on top) R denote the event that a randomly chosen moviegoer attended the war film.