document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1146042>Question 1146042</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 	<BR>\n" );
document.write( "Find the probability that when a couple has four ​children, at least one of them is a boy. ​(Assume that boys and girls are equally​ likely.)<BR>\n" );
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document.write( "The opposite (\"complement\") of \"at least one a boy\" is \"none are boys\", so<br><BR>\n" );
document.write( "P(at least one a boy) =<BR>\n" );
document.write( "1 - P(none are boys) =<BR>\n" );
document.write( "1-(1/2)(1/2)(1/2)(1/2) = 1-1/16 = 15/16 </SPAN>\n" );
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