document.write( "Question 168719This question is from textbook elementary statistics
\n" ); document.write( ": A student takes a 20-question, multiple-choice quiz with 5 choices for each question, find the probability of guessing at least 15 correct out of the 20. Would you consider this event likely or unlikely to occur? \n" ); document.write( "

Algebra.Com's Answer #124456 by Edwin McCravy(20060) $\"\"$ $\"About$

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A student takes a 20-question, multiple-choice quiz with 5 choices for each question, find the probability of guessing at least 15 correct out of the 20. Would you consider this event likely or unlikely to occur?
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document.write( "On your TI-83 or TI-84 calculator, type in\r\n" );
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document.write( "1-binomcdf(20,1/5,14)\r\n" );
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document.write( "and press ENTER.\r\n" );
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document.write( "You'll see  which means\r\n" );
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document.write( "or \r\n" );
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document.write( "which is about 1 chance in 5.5 million.\r\n" );
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document.write( "So it's extremely unlikely.\r\n" );
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document.write( "Edwin

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