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January 26, 2015

January 26, 2015

Posted by **holly** on Thursday, July 5, 2007 at 7:38pm.

Once you have the probability of passing the test with an >80% score happening once, call that P... It will be a very low number if t/f questions were guessed at random. The probability of not passing when trying once is 1-P (which is close to 1). . The probability of not passing after n independent attempts is (1-P)^n. The probability of passing after n attempts is

1 - (1-P)^n.

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