document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=32386>Question 32386</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1.In a shipment of 50 DVD players, 2 are defective. If 30 players are picked at random, what is the probability that none is defcetive?\r<BR>\n" );
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document.write( "2.A shop has 12 flavours of lollipop. The shopkeeper sells the lollipops in packets of three, each packet containing 3 flavours. How many different packets are possible?\r<BR>\n" );
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document.write( "3. If 2 cards are drawn at random from a regular deck of 52 cards without replacement, what is the probability that both cvards are aces </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #20884 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=20884\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> #1 P(player is not defective)= 48/50<BR>\n" );
document.write( " You did't say if the players were selected with replacement. <BR>\n" );
document.write( "I am assuming they were replaced.<BR>\n" );
document.write( "   P(30 selections are made and none is defective)= (48/50)^30=0.29..<BR>\n" );
document.write( "Now I am assuming they were not replaced:<BR>\n" );
document.write( "   [48C30]/[50C30] = 0.155....<BR>\n" );
document.write( "#2 12C3 = [12*11*10]/[1*2*3]= 220<BR>\n" );
document.write( "#3 [4C2]/[52C2]= [(4*3)(1*2)]/[(52*51)/(1*2)]= 6/1326=0.0045...<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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