document.write( "Question 429911: In a fifteen question true false examination a student must acheive five correct answers to pass. If student answer randomly what is the probability that student will fail? \n" ); document.write( "

Algebra.Com's Answer #298572 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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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 respectively. 
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document.write( "In this case p & q are = 1/2 or .5
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document.write( "nCx = 
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document.write( "P( less than 5 correct) = P(4correct)+ P(3)+  P(two)+  P(one)+  P(none)
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document.write( "                          0.041660 +.013890 + .003200 + .000460 + .000030
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document.write( "P( less than 5 correct)= .05923 \n" );
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