The probability of answering 6 out of 10 questions correctly in a true or false examination is

The probability of guessing correctly atleast 8 out of 10 answers on a true falsetype examination is

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

Probability of guessing correctly atleast 7 out of 10 answers in a 'True' or 'False' test is equal to

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

To pass an examination, a candidate needs 40% marks. All questions carry equal marks. A candidate just passed by getting 10 answers correct by attempting 15 of the total questions. How many questions are there in the examination ?

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

In an examination, the probability of a candidate solving a questions is (1)/(2) Out of given 5 question in the examination, what is the probability that the candidate was able to solve at least 2 questions?