document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1042801>Question 1042801</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A true/false test has 4 questions. What is the probability of getting at least 3 right by guessing the answers randomly? </SPAN>\n" );
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document.write( "A true/false test has 4 questions. What is the probability of getting at least 3 right by guessing the answers randomly?<BR>\n" );
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document.write( "The full space of outcomes has &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%5E4 ALIGN=MIDDLE  ALT=\"2%5E4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 16 elements.\r<BR>\n" );
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document.write( "The successive outcomes are &nbsp;(a) 4 matching of 4 (only one), &nbsp;and &nbsp;(b) 3 matching of 4 (4 possibilities).\r<BR>\n" );
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document.write( "Hence, &nbsp;the answer is &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2B4%29%2F16 ALIGN=MIDDLE  ALT=\"%281%2B4%29%2F16\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5%2F16 ALIGN=MIDDLE  ALT=\"5%2F16\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 0.3125.\r<BR>\n" );
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