Brian is participating in a 4-day cross-country biking challenge. He biked for 48, 55, and 58 miles on the first three days. How many miles does he need to bike on the last day so that his average (mean) is 54 miles per day?

A. the following events are mutually exclusive: living in california and watching american idol. true or false b. the number of patients seen by an outpatient practice is an example of a discrete random variable. true or false c.the law of large numbers states that as the number of times an event experiment is conducted increases, the likelihood of the actual probability of an event approaching the theoretical probability decreases. true or false d. measuring the time it takes for patients to enter the operating room is an example of a continuous random variable. true or false