Item 6 of 9 2 Points The probabilities that fast - food restaurant sells 10, 20, 30, 50, 100 burgers daily are 0.20, 0.30, 0.25, 0.15, 0.10 respectively. Let A be the number of burgers that a fast - food restaurant sells. What is the expected value of A? Select the correct response: O 32 33 35 34 Item 7 of 9 2 Points The probabilities that a customer buys 1, 2, 3, 5, 8 apples each day in a grocery store are 0.20, 0.32, 0.23, 0.18, 0.07 respectively. Let B be the number of apples a customer buys in a day. What is the standard deviation? Select the correct response: 3.54 O 2.54 O 1.89 O 3.91