document.write( "Question 97762: Chapter 5: A Survey of Probability ConceptsISBN : 0072868244 Author : Douglas A. Lind, William G. Marchal, Samuel A. Wathen
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\n" ); document.write( "\n" ); document.write( "exercise 42;
\n" ); document.write( "A telephone number consists of seven digits, the first three representing the exchange. How many different telephone numbers are possible within the 537 exchange.
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Algebra.Com's Answer #71134 by ManMan(1)\"\" \"About 
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How many different telephone numbers are possible within the 537 exchange. \r
\n" ); document.write( "\n" ); document.write( "537 _ _ _ _\r
\n" ); document.write( "\n" ); document.write( "The blanks can be the numbers: 0 1 2 3 4 5 6 7 8 OR 9.\r
\n" ); document.write( "\n" ); document.write( "There are 10 choices in total; Multiply the numbers to get your answer:
\n" ); document.write( "10*9*8*7*6*5*4*3*2*1
\n" ); document.write( "10*9=90
\n" ); document.write( "90*8=720
\n" ); document.write( "720*7=5040
\n" ); document.write( "5040*6=30240
\n" ); document.write( "30240*5=151200
\n" ); document.write( "151200*4=604800
\n" ); document.write( "604800*3=1814400
\n" ); document.write( "1814400*2=3628800
\n" ); document.write( "3628800*1=3628800\r
\n" ); document.write( "\n" ); document.write( "The final answer is: 3,628,800
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