Please help me answer the question

The head librarian at the National Library of Australia has asked her assistant for an interval estimate ofthe mean number of books checked out each day. The assistant provided the following 95% interval estimate: from a to b books per day. The interval was constructed by using a sample of 81 days of data with a sample mean of 325 books and a sample standard deviation of 150 books checked out per day. What is the value of b? Select one: Q a. 291.83 0 b. None of the answers listed. 0 c. 361.17 0 d. 296.33 0 e. 357.67 Phuc is playing a math quiz containing 2 questions. The probability that Phuc answers a question correctly is 60%. Each question relates to a different area so the questions are considered independent. What is the probability that Phuc gets at least 1 question correct? Select one: Q a. 34%