A test is composed of six multiple choice questions where each question has 4 choices. If the answer choices for each question are equally likely, find the probability of answering more than 4 questions correctly
2 answers
Use the binomial distribution, with parameters 6 and 1/4. Add up the probabilities for x=5 and x=6.
The probability of answering 5/6 = (1/4)^5 * 3/4
The probability of answering all 6 = (1/4)^6
Either-or probabilities are found by adding the separate probabilities.
The probability of answering all 6 = (1/4)^6
Either-or probabilities are found by adding the separate probabilities.