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

question 118

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 2 of the possible answers on the first 4 questions, and if she guesses on every question, what is the probability that she will answer every question correctly? ​

• A)Pr(all correct) =
• B)Pr(all correct) =
• C)Pr(all correct) =
• D)Pr(all correct) =
• E)Pr(all correct) =