A) 2500
B) 250
C) 120
D) 2400
E) None of these
Correct Answer: A
Solution :
Explanation Option (a) is correct. Ten thousands place can assume only non-zero digits hence ten thousands place can be filled up in 4 ways and thousands place can be filled up in 5 ways since repetition is allowed (and 0 can be filled up in this place). Similarly hundreds, tens and unit places can be filled up in 5 ways each. \[\therefore \] The required number of numbers \[=4\times 5\times 5\times 5\times 5=2500\]You need to login to perform this action.
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