Jodi has probability 0.8 of correctly answering a question chosen at random from a universe of possible questions. The correctness of answers to different questions are independent. In a 100-question set, let X be number of questions that Jodi answers correctly.(a) What is the distribution of X? (you need to specify parameters, if any).(b) What are µX and σX?(c) Find (approximately) the probability that Jodi will answer correctly on at least 90 questions.
Jodi has probability 0.8 of correctly answering a question chosen at random from a universe of
possible questions. The correctness of answers to different questions are independent. In a 100-question set, let X be number of questions that Jodi answers correctly.(a) What is the distribution of X? (you need to specify parameters, if any).(b) What are µX and σX?(c) Find (approximately) the probability that Jodi will answer correctly on at least 90 questions.
