Suppose that you take a 20 question multiple-choice quiz by guessing. Each question has exactly one correct answer of the four alternatives given. What is the probability of getting all 20 questions incorrectly?
1 Answer
Jul 18, 2017
All wrong:
All right:
Explanation:
For each question, there are 3 incorrect answers and 1 correct answer. Each question is a separate event and so we multiply the probabilities.
All answers wrong
That's
All answers right