A student answers luck to 9 questions with yes and no. What is the probability that the answers to all the questions turned out to be correct?

An answer is a set of nine words (yes or no answers).
Total sets of nine words will be 2 ^ 9 = 512.
And only one will be correct.
P = 1/512

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.