Can you pls let me know if I have approached this problem correctly ?
A student is unprepared for a true/false quiz. The quiz has 5 questions. If she guesses at random, what is the probability that (c) she passes the quiz (at least 3 correct answers)?
(1/2)^5 * [5C3] = (1/2)^5 * 60 = 1.9 %
A student is unprepared for a true/false quiz. The quiz has 5 questions. If she guesses at random, what is the probability that (c) she passes the quiz (at least 3 correct answers)?
(1/2)^5 * [5C3] = (1/2)^5 * 60 = 1.9 %