find the number of 5 digit number using the digjit 0,1,2,4,6,8,9 when repeation are allowed
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6!.7!.7!.7!.7!
Step-by-step explanation:
since the first number can be anything except 0 because if it is 0 then the digit will be a four digit number and hence repetitions are allowed hence that is the answer.
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