document.write( "Question 1200980: A quiz contains 2 multiple-choice questions with five possible answers each, only one of
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Algebra.Com's Answer #835209 by ikleyn(52803) $\"\"$ $\"About$

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document.write( "(A)  The sample space consists of 4 possible events\r\n" );
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document.write( "         (guessed 1st answer;         guessed 2nd answer)\r\n" );
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document.write( "         (guessed 1st answer;     not guessed 2nd answer)\r\n" );
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document.write( "         (not guessed 1st answer;     guessed 2nd answer)\r\n" );
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document.write( "         (not guessed 1st answer; not guessed 2nd answer)\r\n" );
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document.write( "(B)  This probability is   = .\r\n" );
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document.write( "(C)  This probability is   = .\r\n" );
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document.write( "(D)  \"At least one answer correct\" is the complement to \"no one answer is correct\".\r\n" );
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document.write( "      The probability \"no one answer is correct\" is what we computed in (B): this probability is  .\r\n" );
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document.write( "      Hence, the answer to (D) is 1 -  = .\r\n" );
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