document.write( "Question 1175319: 5. Old-fashioned mechanical alarm clocks were not all that accurate. Suppose that the alarm on one suck clock is equally likely to go off at any time from 2 minutes before to 2 minutes after the alarm’s setting. Let the random variable X=the amount of time (in minutes) from when the alarm is set to when it goes off. Note that X will be negative if the alarm goes off early.\r
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Algebra.Com's Answer #800914 by ikleyn(52813) $\"\"$ $\"About$

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document.write( "The given uncertainty interval is 20 seconds long (20 = 10 + 10 seconds).\r\n" );
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document.write( "The base uncertainty interval is  4 minutes long (4 = 2 + 2 minutes), or 4*60 = 240 seconds.\r\n" );
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document.write( "The probability under the problem's question is the ratio   = .     ANSWER\r\n" );
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