Question: An unprepared student must take a 7- question multiple-choice test that has 5 possible answers per question. If the student guesses on every question, what

An unprepared student must take a 7- question multiple-choice test that has 5 possible answers per question. If the student guesses on every question, what is the probability that
(a) She will answer every question correctly?
(b) She will answer every question incorrectly?
(c) She will answer at least one question correctly?

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