document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=773457>Question 773457</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Think about all the four - digit numbers you could make with the digits 1-4. What is the probabilty that the first digit will be a 3? Please help. Explain fully. Make me understand so I can explain to others. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #471567 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=471567\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1,2,3,4\r<BR>\n" );
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document.write( "The  sample space  is the set of all possible outcomes \r<BR>\n" );
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document.write( "S={1234, 1243, 1324, 1342, 1423, 1432, 2134, 2143, 2314, 2341, 2413, 2431, 3124<BR>\n" );
document.write( " 3142, 3214, 3241, 3412, 3421, 4123, 4132, 4213, 4231, 4312,4321,}\r<BR>\n" );
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document.write( "24 numbers can be formed.\r<BR>\n" );
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document.write( "number of sample points = n(S)=24\r<BR>\n" );
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document.write( "We should get a number starting from 3. How many are there?\r<BR>\n" );
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document.write( "Number of favourable outcomes Or event of a number starting from 3<BR>\n" );
document.write( "denote by set A<BR>\n" );
document.write( "A={3124, 3142, 3214, 3241, 3412, 3421,}<BR>\n" );
document.write( "n(A)=6\r<BR>\n" );
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document.write( "probability of the number starting from 3 =( number of favorable outcomes/number of possible outcomes)\r<BR>\n" );
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document.write( "n(P) = n(A)/n(S)\r<BR>\n" );
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document.write( "=6/24\r<BR>\n" );
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document.write( "=1/4 </SPAN>\n" );
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