"In a Canadian population, 30% of people spend 4 hours or more per day on smartphone; 25% of people have difficulty falling asleep within 30 min; and 20% of people spend 4 hours or more per day on smartphone and have trouble falling asleep within 30 min. If a person is randomly selected from the population who spend less than 4 hours per day on smartphone, what is the probability this person have difficulty falling asleep within 30 min?"

Answer rating: 100% (QA)

To solve this problem we can use the concept of conditional probability Lets denote the events as fo... View the full answer