During the Ramadhan month, there are 300,000 shoppers in the Bangi area. Each of these shoppers is extremely likely to purchase 'baju raya'. Their choices (whether or not to purchase baju raya) are made independently. Suppose that a person purchases baju raya with probability 99,999/100,000 and declines to purchase baju raya with probability 1/100,000. Let X be the number of people who decline to purchase baju raya. a. Give an exact formula for the probability that P(X 3) d. Use a Poisson estimation for the probability in part a. e. Use your calculator to evaluate the Poisson expression that you gave in part d