Four persons are asked the same question by an interviewer.If each has independently a probability` 1/6` of answering correctly then the probability that at least one of them answers correctly is

Probability of a boy to answer a question is 1/2 and a girl is 1/3 what is the probability that both of them answer correctly

Find the probability of guessing correctly at least nine out of ten answers in a "true" or "false" objective test.

Each of five questions on a multiple choice examination has four choices, only one of which is correct. A student is attempting to guess the answer. If the random variable X is the number of questions answered correctly, the probability that the student will get exctly three answer correct is

As an answer to a question , two options are given only one of which is correct , then the propbability of correctly answering at least 6 of the 10 questions is ….

In an examination, there are 3 multiple choice questions and each question has 4 choices. If a student randomly selects answer for all the 3 questions, what is the probability that the student will not answer all the 3 questions correctly ?

A and B appeared for an interview. The probability of their selection is (1)/(2) and (1)/(3) respectively. Find the probability that : (i) both selected (ii) at least one of them selected.