document.write( "Question 484752: 1) how many 6 digits telephone numbers are there that begin with 21 and that contain 4 or 3?
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Algebra.Com's Answer #331610 by sudhanshu_kmr(1152)\"\" \"About 
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\n" ); document.write( "number of possible numbers = 10^4 - 8^4 = 10000- 4096 = 5904
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