document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=574385>Question 574385</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Define the following two events for two tosses of a coin: \r<BR>\n" );
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document.write( "A = at least one head is obtained \r<BR>\n" );
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document.write( "B = both tails are obtained \r<BR>\n" );
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document.write( "Are A and B complementary events? \r<BR>\n" );
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document.write( "If yes, first calculate the probability of B and then calculate the probability of A using the complementary event rule.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #369049 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=369049\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Define the following two events for two tosses of a coin: <BR>\n" );
document.write( "A = at least one head is obtained <BR>\n" );
document.write( "B = both tails are obtained <BR>\n" );
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document.write( "P(2 tails) = (1/2)^2 = 1/4<BR>\n" );
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document.write( "P( at least one head) = 1 - P(no heads) = 1 - (1/4) = 3/4<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.   </SPAN>\n" );
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