document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1180290>Question 1180290</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the probability for the experiment of tossing a coin three times. Use the sample space S = {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}.\r<BR>\n" );
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document.write( "The probability of getting at least two tails </SPAN>\n" );
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document.write( "\"at least two\" means \"two or more\"\r<BR>\n" );
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document.write( "The subset of cases where we get two or more tails is this: {HTT, THT, TTH, TTT}<BR>\n" );
document.write( "We're listing out any outcome where T shows up twice or more. \r<BR>\n" );
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document.write( "We have 4 items in that set above. This is out of 8 total outcomes. The probability of getting two or more tails is 4/8 = 1/2.\r<BR>\n" );
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document.write( "Answer: 1/2<BR>\n" );
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