Answer : 3 3439 Explanation : Answer: C) 3439 Explanation: The numbers 0,1,2,3,4,5,6,7,8,9 are 10 in number while preparing telephone numbers any number can be used any number of times. This can be done in 105ways, but

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Using numbers from 0 to 9 the number of 5 digit telephone numbers that can be formed is