Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The number of 5 digit telephone numbers having at least one of their digits repeated is
Text Solution
Verified by ExpertsThe correct answer is:
D
Using the digits 0, 1, 2,.......,9 the number of five digit telephone numbers which can be formed is 
.
(since repetition is allowed)
The number of five digit telephone numbers which have none of the digits repeated = 
The required number of telephone numbers
= 
.
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