document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=388294>Question 388294</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a penny Toss game, a player tosses 4 pennies. The player wins a pen-and-pencil set if he/she tosses exactly 2 heads and 2 tails. Any other combination is a loss for the player. What is the probability of winning this game? If someone played this game 80 times, about how many pen-and-pencil sets would he/she win? Show and explain your calculations. \r<BR>\n" );
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document.write( "Please help me! I would greatly appreciate your help :) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #274901 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=274901\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The probability of getting 2 heads and two tails in a single toss of four unbiased/fair pennies, or the probability of winning this game, is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4C2%2A%281%2F2%29%5E2%281%2F2%29%5E2+=+6%2A%281%2F16%29+=+6%2F16+=+3%2F8 ALIGN=MIDDLE  ALT=\"4C2%2A%281%2F2%29%5E2%281%2F2%29%5E2+=+6%2A%281%2F16%29+=+6%2F16+=+3%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  If someone played this game 80 times, the expectation is that he wins (3/8)*80 = 30 times.<BR>\n" );
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