SOLUTION: A multiple choice trivia quiz has 10 questions, each with 5 possible answers. If someone guesses each answer randomly, what is the probability of them getting one or two correct an
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Question 875860: A multiple choice trivia quiz has 10 questions, each with 5 possible answers. If someone guesses each answer randomly, what is the probability of them getting one or two correct answers?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
p = .2, n = 10
P(1 0r 2) = 10C1(.2)^1(.8)^9 + 10C2(.2)^2(.8)^8
Using
p and q are the probabilities of success and failure respectively.
In this case p= .2 and q = .8 and n = 10
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