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What is the sum of all the 3 digit number formed by using digits 2, 5, 7 & 9 (repetition being not allowed)?

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What is the sum of all the 3 digit number formed by using digits 2, 5, 7 & 9 (repetition being not allowed)?
posted Jan 10 by anonymous

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1 Answer

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There should 4C3 = 4 such numbers where the numbers chosen for the 3 digit numbers aren't repeated.
257
579
792
925 +
2553.

answer Jan 10 by Tejas Naik



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