SOLUTION: a multiple choice question has 15 questions, each with 4 possible answers of which only 1 is the correcr answer. What is the porbability that a students gets atleast 1 correct ans

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Question 906288: a multiple choice question has 15 questions, each with 4 possible answers of which only 1 is the correcr answer. What is the porbability that a students gets atleast 1 correct answer?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
p(correct) = .25
P(at least one) = 1 -P(none) = 1 - .75^15