In a 50 marks examination,there is 80% possibility to pass in that exam. So find the probability for pass in exam.

A candidate take three tests in succession and the probability of passing the first test is p. The probability of passing ech succeeding test p or p/2 according as he passes or fails in the preceding one. The candidate is selected if he passes at least two tests. The probability that the candidate is selected is

For a student the probability of getting a pass in one paper is 75% and the probability of getting a pass in another paper is 60% . The probability for the student to pass in one paper of the two papers) only is

Two students Anil and Ashima appeared is an examination. The probability that Anil will qualify the examination is 0.05 and that Ashima will qualify the examination is 0.10. The probability qualify the examination is 0.02. Find the probability that (a) Bothe Anil and Ashima will not qualify the examination. (b) Atleast one of them will qualify the examination and (c) Only one of them will qualify the examination.

One hundred students appeared for two examinations 60 passed in first, 50 passed the second and 30 passed both. The probability that a student selected at random has failed in both examinations is

A: If the probabilities of A and B to pass the examination are 2//10, 3//10 then the probability that only one of them to pass the examination is 19//50 . R: If A, B are two events then P(A-B) = P(A)-P( A cap B ).

Five coins are tossed whose faces are marked 2 and 3 . Find the probability of getting sum 12.

On a multiple choice examination with three possible answers for each of the five questions. Then what is the probability that a candidate would get four or more correct answer is