(Solution Download) conditional probability


A student takes a multiple-choice exam. Suppose for each question he either knows the answer or gambles and chooses an option at random. Further suppose that if he knows the answer, the probability of a correct answer is 1,and if he gambles this probability is 1/4. To pass, students need to answer at least 60% of the questions correctly. The student has ?studied for a minimal pass,? i.e., with probability 0.6 he knows the answer to a question. Given that he answers a question correctly, what is the probability that he actually knows the answer?

 







About this question:

Pay using PayPal (No PayPal account Required) or your credit card. All your purchases are securely protected by .
SiteLock