Suppose you take an test for a course which consists of 5 multiplechoice questions. each worth 1 mark. To get an A-, you need over 80%. Suppose you choose your answer to each question at random. What is the probability that you get at least an A? Suppose you run a store, and customers typically arrive at a rate of one every 20 minutes. Assume this is a Poisson process. You open your store at 8am. What is the probability that the rst customer arrives after 9am? 70% of tomato plants survive after being transplanted from a pot to a garden (assume independently of one another}. You transplant three of these plants. What is the probability that at least two of them survive