Three-digit numbers are formed from the digits 1,2 and 3 in such a way that the digits are not repeated. What is the sum of such three-digit numbers?

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Quantrex Academy · Accepted Answer

Correct answer: D. 1332

Sum of the numbers = Sum of given numbers. (n-1)! [10^0+10^1+10^2+ ..] Here, sum of three digit numbers = Sum of the numbers (3-1)![10^ ^ +10^1+10^2] aligned & =(1+2+3)(3-1)![10^0+10^1+10^2] & =6 ×2 ×1[1+10+100] & =12 ×111 & =1332 aligned

Three-digit numbers are formed from the digits 1,2 and 3 in such a...

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