document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=453640>Question 453640</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a coin collection there are 9 pennies, 8 nickels, 12 dimes, 16 quarters, 11 half-dollars and 4 dollar pieces.  A coin is randomly selected from the collection by a blind folded boy who gets to keep the coin picked.  What is the expected value? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #311674 by </B><A HREF=/tutors/aboutme.mpl?userid=ilana><B>ilana(307)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ilana><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=311674\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The expected value is the sum of each probability times its value.<BR>\n" );
document.write( "P(penny) = 9/60<BR>\n" );
document.write( "P(nickel) = 8/60<BR>\n" );
document.write( "P(dime) = 12/60<BR>\n" );
document.write( "P(quarter) = 16/60<BR>\n" );
document.write( "P(half-dollar) = 11/60<BR>\n" );
document.write( "P(dollar) = 4/60<BR>\n" );
document.write( "Expected value = 1*9/60 + 5*8/60 + 10*12/60 + 25*16/60 + 50*11/60 + 100*4/60<BR>\n" );
document.write( "= (9 + 40 + 120 + 400 + 550 + 400)/60<BR>\n" );
document.write( "= 1519/60<BR>\n" );
document.write( "= approx. $25.32<BR>\n" );
document.write( " </SPAN>\n" );
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