Fifteen items or less: The number of customers in line at a supermarket express checkout counter is a random variable with the following probability distribution. P(x) 0.10 0.20 0.30 0.20 0.15 0.05 (c) If each customer takes 3 minutes to check out, what is the probability that it will take more than 9 minutes for all the customers currently in line to check out? The probability that it will take more than 9 minutes for all the customers currently in line to check out isI