document.write( "Question 419238: A quiz has five multiple-choice questions, each with 4 possible answers. If the quiz is solved by guessing, find the probability that at least one answer is correct \n" ); document.write( "

Algebra.Com's Answer #293253 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "A quiz has five multiple-choice questions, each with 4 possible answers.  
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document.write( "P(guessing answer correctly) = .25
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document.write( "P(guessing incorrectly) = .75
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document.write( "Note: The probability of x successes in n trials is: 
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document.write( "P = nCx*  where p and q are the probabilities of success and failure 
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document.write( "respectively. In this case p=.25and q =.75
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document.write( "nCx = 
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document.write( "P(atleast one correct of the 5 questions) = 1 - P(none correct) = 1 - (.75)^5 \n" );
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