SOLUTION: Suppose that the probability that the student knows the answer to the question is 0.6 and that the student guesses if they do not know the answer. If student guesses, the probabili

Algebra ->  Probability-and-statistics -> SOLUTION: Suppose that the probability that the student knows the answer to the question is 0.6 and that the student guesses if they do not know the answer. If student guesses, the probabili      Log On


   



Question 910733: Suppose that the probability that the student knows the answer to the question is 0.6 and that the student guesses if they do not know the answer. If student guesses, the probability of correct answer is 0.28. If the student knows, you can assume that they did not guess and got the question right.
If the question is answered correctly what is the probability that the student really knew the correct answer?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
If A and M are mutually exclusive,
P(A or B) = P(A) + P(B)
P = .6 + .4(.28)