- Question 2 Permutations Combinations 40 Points Three Digital E Readers Are Selected At Random Out Of 15 Out Of Thes 1 (381.93 KiB) Viewed 86 times
Question 2: Permutations, Combinations (40 points) Three digital e-readers are selected at random out of 15. Out of these 15 e-readers, 4 are defective. Suppose that event A = {all the three e-readers are defective) and event B = {all the three e-readers are fine) a) How many choices are there to select 3 e-readers from the 15 e-readers? [10 points) b) Find the number of ways that event A can occur. 4 choose 3 [10 points] c) What is the probability of event B? (round to 4 decimal places) [10 points) d) What is the probability that at least one e-reader is defective (round to 4 decimal places) and explain by words your approach/steps? [10 points)