Question

An unprepared student makes random guesses for the ten true or false questions on a quiz.find the probablity that there is at least one correct answer.

Answer 1

prob that he will get all of the wrong
= (1/2)^10 = 1/1024

so prob that he will get at least one correct
= 1 - 1/1024 = 1023/1024

Answer 2

Forever