Question
In answering a question on a multiple choice test, a student either knows the answer or guesses. Let be the probability that he knows the answer and be the probability that he guesses. Assuming that a student who guesses at the answer will be correct with probability , what is the probability that the student knows the answer given that he answered it correctly
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A six-faced dice is so biased that it is twice as likely to show an even number as an odd number when thrown. It is thrown twice, the probability that the sum of two numbers thrown is even is
b.
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d. Question 2
From a well shuffled deck of cards, cards are drawn with replacement. If represent numbers of time ace coming, then the value of is (a) (24)/(169) (c) (23)/(169) Question Text | In answering a question on a multiple choice test, a student either knows the answer or guesses. Let be the probability that he knows the answer and be the probability that he guesses. Assuming that a student who guesses at the answer will be correct with probability , what is the probability that the student knows the answer given that he answered it correctly |