document.write( "Question 4722: What is the sum of the digits of the four-digit numbers formed using the digits
\n" ); document.write( "2,4,6,8(repetitions not allowed).
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Algebra.Com's Answer #429066 by trip.3c(1)\"\" \"About 
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Total no of arrangements possible = 4! = 24
\n" ); document.write( "So, no of occurences for all the 4 digits unit place = 24/4 = 6times. So sum of all such unit numbers = 6 [ 8 + 6 + 4 + 2 ] = 6*20 = 120
\n" ); document.write( "Similarly, for tenth, hundredth and thousandth place
\n" ); document.write( "The sum of 24 times 120 in 4 places(thousandth, hundredth, tenth and unit) = 133320
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