A) 738
B) 792
C) 837
D) 720
Correct Answer: A
Solution :
The number of 1 digit number = 9 The number of 2 digit non-repeated number \[=9\times 9=81\] The number of 3 digit non-repeated number \[=9\times {{\,}^{9}}{{P}_{2}}\] \[=9\times 9\times 8=648\] \[\therefore \] Required number of ways\[=9+81+648\] \[=738\]You need to login to perform this action.
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