An Unprepared Student Must Take a 7-Question, Multiple-Choice Test That

question 159

Multiple Choice

An unprepared student must take a 7-question, multiple-choice test that has 5 possible answers per question. If the student can eliminate two of the possible answers on the first five questions, and if she guesses on every question, what is the probability that she will answer at least one question correctly? ​

• A)Pr(at least 1 correct) =
• B)Pr(at least 1 correct) =
• C)Pr(at least 1 correct) =
• D)Pr(at least 1 correct) =
• E)Pr(at least 1 correct) =