Question 429568
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Hi
three multiple-choice questions. Each has one corect answer
first question has four possible answers
the second question has five possible answers
third question has six possible answers
P(answering 1 & 2 correctly & 3 incorrectly) = 1/4*1/5*5/6
P(at least one question is answered correctly) = 1 - P(none) = 1 - 3/4*4/5*5/6