Every evening a student either watches TV or reads a book. The probability of watching TV is `(4)/(5)`. If he watches TV, the chance that he will fall a sleep is `(3)/(4)` and it is `(1)/(4)` when he read a book. On one evening, the student is found to be asleep. The probability that he watched TV is

The probability that a student passes in Mathematics is and the probability that hepasses in English is (2)/(3) .and the probability that he hepasses in English is (4)/(9). The probability that he passes in any one of the courses is (4)/(5) .The probability that he passes in both is

The probability that a person will get an electric contact is (2)/(5) and the probability that he will not get plumbing contract is (4)/(7). If the probability of getting at least one contract is (2)/(3), what is the probability that he will get both.

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 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?

The probability that a married man watches a certain T.V. show is 0.4 and the probability that a married woman watches the show is 0.5 The probability that a man watches the show , given that his wife does , is 0.7 Find . (a) The probability that married couple watch the show (b) the probability that a wife watches the show given that her husbands does. ( c) The prbability that atleast one person of a married couple will watch the show.

In answering a question on a multiple choice test, a student either knows the answer or gusses. Let 3/4 be the probability that he knows the answer and 1/4 be the probability that he gusses. A ssuming that a student who gusses and the answer will be correct with probability 1/4 What is the probability that the studentthe answer given that he answered it correctly?