A professor gives a short quiz of 10 questions; each question has four possible answers. What is the probability of getting two incorrect answers? (Use Binomial Table)
Solution: Given that n = 10, p = 1/4 = 0.25, X = 2
The probability of getting two incorrect answers is 0.2816
=> P(X = r) = nCr*p^r*q^(n-r)
P(X = 2) = 10C2*0.25^2*0.75^8
= 0.2816
A professor gives a short quiz of 10 questions; each question has four possible answers. What...
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