A student is given 6 questions in a true or false examination If he gets 4 or more correct answers he passes the examination.The probability that he passes the examination is

A student has appeared for an examination. There are 20 question in the paper, with four multiple answer. If he answers correctly he gets 4 marks and if the answer is wrong he gets - 1 mark. A Student will pass in the examination if he gets 50% of the marks.If a student answers by sheer guessing, then the probability that he will pass in the examination is

A student has appeared for an examination.There are 20 questions in the paper,with four multiple answers.If he answers correctly,he gets 4 marks and if the answer is wrong,then he gets-1 mark.A student will pass in the examination if he gets 50% of the marks.If a student answer by sheer guessing,then what is the probability that he will pass in the examination?

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

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

The overall percentage of passes in a certain examination is 80 . If six candidates appear in the examination what is the probability that at least five pass the examination .

A student is given a quiz with 10 true or false question, and he answers by sheer guessing. If X is the number of question answered correctly. If the student passes the quiz by getting 7 or maximum correct answer, then the probability that the student passes the quiz is