document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1131955>Question 1131955</A>: <I><SPAN STYLE=\"word-break: break-all;\"> From a pack of 9 cards numbered 1-9, three cards are drawn at random and laid on a table from left to right. What is the probability that the number formed exceeds 400?\r<BR>\n" );
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document.write( "I know the 1st digit has to be 4,5,6,7,8 or 9, but don't know how to calculate the no. of ways. </SPAN>\n" );
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document.write( "I don't know what you mean when you say you don't know how to calculate the \"number of ways\".<br><BR>\n" );
document.write( "The number of ways of what?<br><BR>\n" );
document.write( "The only thing that matters is the first digit; you don't care about the remaining digits.  If the first digit is 4, 5, 6, 7, 8, or 9, then the 3-digit number will be greater than 400; if the first digit is 1, 2, or 3, it will not be.<br><BR>\n" );
document.write( "So 6 out of the 9 possible first digits give you what you want; the probability is 6/9, or 2/3. </SPAN>\n" );
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