For a student to qualify, he must pass at least two out of three exams. The probability that he will pass the 1st exam is p. If he fails in one of the exams, then the probability of his passing in the next exam, is p/2 otherwise it remains the same.Find the probability that he will qualify.

A tennis match of best of 5 sets is played by two players Aa n dB . The probability that first set is won by A is 1/2 and if he loses the first, then probability of his winning the next set is 1/4, otherwise it remains same. Find the probability that A wins the match.

A tennis match of best of 5 sets is played by two players A and B. The probability that first set is won by A is 1/2 and if he losed the first, then probability of his winning the next set is 1/4, otherwise it remains same. Find the probability that A wins the match.

The probability that a student passes at least in one of the three examinations A,B,C is 0.75, the probability that he passes in atleast two of the exams is 0.5 and the proabability he passes exactly two of the exams is 0.4 . If alpha,beta, gamma , are respectively the probabilities of the student passing in A,B,C then.

A student can pass test 1 with a probability of 3/4 . For the next three tests, the probability of passing in test k(k ge 2) depends on his passing test (k-1). If he passes test (k 1), then probability of passing test k is 3/4 otherwise 1/4 . Let p be the probability that he passes at least three tests out of first four, then 16/27p is equal to ____

The probability of passing in an exam for Ramesh, Jay, Sunil are (3)/(7),0.78 and 66%. Who has least probability of passing ?

Probability that A will pass the exam is (1)/(4) , B will pass the exam is (2)/(5) and C will pass the exam is (2)/(3) . The probability that exactly one of them will pass th exam is

Probability that Priyanka will pass an exam is 'k', she appeared in 5 exams and if probability that she will pass is exactly 4 out of 5 then find the value of 'k'

In a school 25% students are failed in Mathematics, 15% in Physics and 5% students fail in both Mathematics and Physics. A student is selected at random. (i) If he is fail in Physics, find the probability that he is fail in Mathematics. (ii) If he is fail in Mathematics, find the probability that he in fail in Physics. (iii) Find the probability that he is fail either in Mathematics or in Physics.

The probability that a student will pass in Mathematics is 3/5 and the probability that he will pass in English is 1/3. If the probability that he will pass in both Mathematics and English is 1/8, what is the probability that he will pass in at least one subject?

Two students Anil and Ashima appeared in 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 that both will qualify the examination is 0.02. find the probability that: i. Both Anil an Ashima will not qualify the exam ii. At least one of them will not quality the exam iii. Only one of them will qualify the exam.