1. Tardigrade
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  3. Mathematics
  4. The arithmetic mean of the nine numbers in the given set 9,99,999, ldots ldots .999999999 is a 9 digit number N, all whose digits are distinct. The number N does not contain the digit

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Q. The arithmetic mean of the nine numbers in the given set $\{9,99,999, \ldots \ldots .999999999\}$ is a 9 digit number $N$, all whose digits are distinct. The number $N$ does not contain the digit

Sequences and Series

Solution:

$N =\frac{1}{9}\{9+99+999+\ldots .+999999999\}=1+11+111+\ldots \ldots+111111111 $
$=123456789 \Rightarrow \text { (A) }$