Help Acrobat Find ~ ED 21 1 Normal No Spacing Heading Title Replace Select ~ IN Styles Editing 2. Richard has just been given a 10-question multiple-choice quiz in his history class. Each question has five answers, of which only one is correct. Since Richard has not attended class recently, he doesn't know any of the answers. Assuming that Richard randomly guesses on all 10 questions, let r represent the number of questions Richard answers correctly, and assume that r has a binomial distribution (NO NEED TO CHECK THE REQUIREMENTS OF A BINOMIAL DISTRIBUTION ARE MET). a) What is the probability that Richard will answer at least 7 questions correctly b) What is the expected number of questions Richard will answer correctly? What is the standard deviation of the number of questions he will answer correctly? cyif Richard actually answers 5 questions correctly in the quiz, is this number of correct answers considered unusual? EXPLAIN VERY WELL YOUR