In answering a question on a multiple choice test, a student either knows the answer or guesses. Let `3/4` be the probability that he knows the answer and `1/4` be the probability that he guesses. Assuming that a student who guesses at the answer with probability 1/4. what is the probability that the student knows the answer given that he answers correctly.?

In answering a question on a multiple choice test, a student either knows the answer or guesses. Let 3/5 be the probability that he knows the answer and 2/5 be the probability that he guesses. Assuming that a student who guesses at the answer will be correct with probability 1/3 , what is the probability that the student knows the answer given that he answered it correctly

In answering a question on a multiple choice test a student either knows the answer or guesses. Let the probability that he knows the answer is 3/4 and probability that he guesses is 1/4 . Assuming that a student who guesses the answer and given correct answer is 1/4 . What is the probability that student knows the answer given that he answered it correctly?

In an entrance examination, a candidate is to answer a multiple choice question which has four alternative solutions. The candidate either guesses the answer or he knows the answer. The probability that he knows the answer is 0.6. The examiner has found that the candidate has answered the question correctly. Find the probability that the candidate knew the answer, given that he answered it correctly.

In a competitive examination, an examinee either guesses or copies or knows the answer to multiple choice question with four choices. The probability that he makes a guess is 1/3 and the probability that he copies the answer is 1/6. The probability that the answer is correct, given that he copies it, is 1/8 . Find the probability that he knows the answer to the question, given that he correctly answered

The probability that a student is not swimmer is 1//4 . Then the probability that out of five students atleast four are swimmers is

In a competitive examination, an examinee either guesses or copies or knows the answer to amultiple choice question with four choices. The probability that he makes a guess is 1/3 and the probability that he copies the answer is 1/6. The probability that the answer is correct, given that he copiedit, is 1/8 . Find the probability that he knows the answer to the question, given that he correctly answered

In a competitive examination, an examinee either guesses or copies or knows the answer to amultiple choice question with four choices. The probability that he makes a guess is 1/3 and the probability that he copies the answer is 1/6. The probability that the answer is correct, given that he copiedit, is 1/8 . Find the probability that he knows the answer to the question, given that he correctly answered

The probability that a teacher will give a surprise test during any class is 1/5. If a student is absent on two day what is the probability that he will miss atleast one test.

In a test an examinee either guesses, copies or knows the answer to multiple choice question with five choices. The probability that he makes a guess is 1/4 and probability that he copies the answer is 1/8 . The probability that his answer is correct given that he copies is 1/10 . Find the probability that he knows the answer to the question given that he correctly answered it:

The probability that a student is not a swimmer is 1/5. Then find the probability that out of 5 students exactly 4 are swimmer.