Homework Help: math

Posted by rency on Tuesday, October 27, 2009 at 10:53pm.

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.

math - Reiny, Tuesday, October 27, 2009 at 10:59pm
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

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