the overall percentage of failures in a certain examination is 40 what is the probability that out of a group of 6 candidates at least 4 passed the examination ?

What is the probability of guessing correctly at least 8 out of 10 answer on true-false examination?

40% of the students in a class are girls. If 60% and 70% fo the boys and the girls respectively of the class pass a certain test, what is the probability that a randomly selected student from the class will have passed the test?

In a class of 10 student, probability of exactly i students passing an examination is directly proportional to i^(2). Then answer the following questions: If a students selected at random is found to have passed the examination, then the probability that he was the only student who has passed the examination is

M and E are two equally strong football teams. what is the probability that E beats M in at least 2 games out of 4.

The probability that a candidate passes in physics is 70% and that the passes in chemistry is 40% . What is the probability that the candidate passes in any one of the two subjects ?

The probability that a student will pass the final examinatin in both English and Hindi is 0.5 and the probability of pasing neither is 0.1. If the probability of passing the English examination is 0.75. What is the probability of passing the Hindi examination?

In an entrance test that is graded of the basis of two examination, the probability of a randomly chosen student passing the first examination is 0.8 and the probability of passing the second examination is 0.7. The probability of passing atleast one of them is 0.95. What is the probability of passing both?

25% of the inhabitnts in a large town are bespectacled. What is the probability that a randomly selected group of 6 inhabitants will include at most 2 bespectacled pesons?

A candidate is selected for interview for the three posts. For the first post there are 3 candidates, for the second there are 4 and for the third there are 2. what is the probability that the candidate getting at least one post?

5 men in a company of 20 are graduates. If 3 men are picked out of the 20 at random, what is the probability that they are all graduates? What is the probability of at least one graduate?