The time to fly between New York City and Chicago is uniformly distributed with a minimum of 94 minutes and a maximum of 100 minutes. What is the probability that a flight is between 95 and 99 minutes?   Multiple Choice   1.00   0.67   0.44   0.56

In a large population, 68 % of the people have been vaccinated. If 4 people are randomly selected, what is the probability that AT LEAST ONE of them has been vaccinated? Give your answer as a decimal (to at least 3 places) or fraction.

3. (Rosner book – Page 110, Q: Infectious Disease) A study considered risk factors of HIV infection among intravenous drug users. It found that 40% of users who had 100 injections per month (heavy users) were HIV positive. a. What is the probability that exactly 3 of 5 light users are HIV positive? b. What is the probability that at least 3 of 5 light users are HIV positive? c. Suppose we have a group of 10 light users and 10 heavy users. What is the probability that exactly 3 of the 20 users are HIV positive? d. What is the probability that at least 4 of the 20 users are HIV positive? e. Is the distribution of number of HIV positive among the 20 users binomial? Why or why not?

The probability that an adult possesses a credit card is .75. A researcher selects two adults at random. The probability that the first adult possesses a credit card and the second adult does not possess a credit card