[" The number of "5" digit telephone numbers having "],[" atleast one of their digits repeated is "]

The number of four digits telephone numbers having atleast one of their digit is repeated

The number of 5- digit telephone number having at least one of their digits repeated is :

The number of five digit telephone numbers having at least one of their digits repeated is

Find the number of 5-digit telephone numbers having at least one of their digits repeated.

The number of five - digit telephone numbers having atleast one of their digits repeated is (00000 is also a telephone number)

The number of four digit telephone numbers having at least one of their digits repeated is: (Note: 0 can be accepted in first place)