document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=393530>Question 393530</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose we flip four coins simultaneously: a penny, a nickel, a dime, and a quarter. What is the probability that\r<BR>\n" );
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document.write( "(a) they all come up heads?<BR>\n" );
document.write( "(b) the penny and nickel both come up heads?<BR>\n" );
document.write( "(c) the penny and dime both come up the same?<BR>\n" );
document.write( "(d) at least 15 cents wort of coins come up heads? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #279270 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=279270\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Suppose we flip four coins simultaneously: a penny, a nickel, a dime, and a quarter. What is the probability that <BR>\n" );
document.write( "(a) they all come up heads?:::: (1/2)^4 = 1/16<BR>\n" );
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document.write( "(b) the penny and nickel both come up heads?<BR>\n" );
document.write( "(1/2)(1/2)*1*1 = 1/4<BR>\n" );
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document.write( "(c) the penny and dime both come up the same?<BR>\n" );
document.write( "2*(1/4)(1/4)*1*1 = 1/8<BR>\n" );
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document.write( "(d) at least 15 cents worth of coins come up heads?<BR>\n" );
document.write( "I'll leave that to you.<BR>\n" );
document.write( "Take a look at the 16 points in the sample space<BR>\n" );
document.write( "and see how many combinations of coins has value<BR>\n" );
document.write( "15 cents or greater.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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