Jenny did a survey in her statistics class and found that 15 out of 24 study in the Learning Center at least three times a week. Answer the following questions. Express answers as a decimal. (a) What is the probability that a student choose at random from the class uses the Learning Center at least three times a week? (b) What is the probability that a student chosen at random from the class uses that Learning Center less often than three time a week? (c) If three students are chosen at random from the class, what is the probability that all three of them use the Learning Center at least three times a week?

A manufacturer has determined that a machine averages one faulty unit for every 500 it produces. What is the probability that an order of 300 units will have one or more faulty units?

What term is used to express the likelihood of an event occurring? Are there restrictions on its values? If so, what are they? If not, explain.