document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1105635>Question 1105635</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A coin is tossed three times. What is the probability of getting A. Two heads and a tail B. At least one head<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #720497 by </B><A HREF=/tutors/aboutme.mpl?userid=math_helper><B>math_helper(2461)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_helper><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=math_helper><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=720497\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "A.   P(2 H and 1 T) =  P(one T) = <b>3/8</b>      (3 positions for T, 8=2^3 possible outcomes)<BR>\n" );
document.write( "B.   P(>= 1 H) = 1 - P(no H) = 1 - 1/8 = <b>7/8</b>\r<BR>\n" );
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document.write( "Check:<BR>\n" );
document.write( "This problem is short enough to enumerate the outcomes:<BR>\n" );
document.write( "TTT    (used in B)<BR>\n" );
document.write( "TTH   <BR>\n" );
document.write( "THT<BR>\n" );
document.write( "THH   (A)<BR>\n" );
document.write( "HTT<BR>\n" );
document.write( "HTH   (A)<BR>\n" );
document.write( "HHT   (A)<BR>\n" );
document.write( "HHH \r<BR>\n" );
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