CanYou Guess Correct Time ?

A watch, which gains time uniformly, was 5 minutes behind the correct time when it showed 11:55 AM on Monday. It was 10 minutes ahead of the correct time when it showed 06:10 PM on the next day. When did the watch show the correct time?

A multiple choice emamination has 5 questions. Each question has three alternative answers of which exactly one is correct. The probability that a student will get 4 or more correct answers just guessing is

A multuple choice examination has 5 questions. Each questions has three alternative answers of which exactly one is correct. The probability that a student will get 4 or more correct answers just be guessing, is

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

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

The probability of guessing the correct answer to a certain question is x . If probability of not guessing the correct answer is 2/3 , then find x.