[" If takitent takes examination in four subjects "A,B,C,D." His chances of passing in "A are(4)/(5)," in "B" are "],[(3)/(4)," in Care "(5)/(6)" and in Dare "(2)/(3)" .To qualify he must pass in "A" and atleast in two other subjects.What "],[" the probability that he qualifies? "]

A student takes examination in four subjects A, B, C, D. His chances of passing in A are 4/5 , in B are 3/4 , in C are 5/6 and in D are 2/3 . To qualify he must pass in A and atleast in two other subjects. What is the probability that he qualifies ?

A problem in statistics is given to four students A, B, C and D. Their chances of solving it are (1)/(3), (1)/(4), (1)/(5) and (1)/(6) respectively. What is the probability that the problem will be solved?

A college student has to appear for two examinations A and B. The probabilities that the student passes in A and B are 2/3 and 3/4 respectively. If it is known that the student passes at least one among the two examinations, then the probability that the student will pass both the examination is (A) 1/6 (B) 1/2 (C) 1/3 (D) 6/11

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 student passes a physics test is 2/3 and the that he passes both a physics and English test is 14/25 . The that he passes at least one test is 4/5 . What is the probability that he passes the English test.

In an examination, there are five subjects and each has the same maximum. A boy’s marks are in the ratio 3 : 4 : 5 : 6 : 7and his aggregate is (3)/(5) th of the full marks. In how many subjects did he get more than 50% marks ?

The probability that Hemant passes in English is (2/3) and the probability that he passes in Hindi is (5/9). If the probability of his passing both the subjects is (2/5), find the probability that he will pass in at least one of these subjects.

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 ____