1. A factory find that, on average, 10% of the bulbs produced by a given machine will be defective for a certain specified requirements. If 8 bulbs are selected at random from the day's production of this machine, find the probability: (a) the exactly 2 will be defective, (b) that 2 or more will be defective, and (c) that more that 5 will be defective. 2. Jun is taking a multiple-choice examination that consists of five questions. Each question has four possible answers. Jun guesses at every answer. What is the probability that he passes the exam if he needs at least three correct answers to pass? 3. A lot of 100 batterries is known to contain 10 defective batteries. Five batteries are selected at random and each battery is replaced before the next battery is selected. What is the probability of getting at most two defective batteries