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

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

The number of five-digit telephone numbers having atleast one of their digits repeated is a. 90000 b. 100000 c. 30240 d. 69760

The number of five-digit telephone numbers having atleast one of their digits repeated is a. 90000 b. 100000 c. 30240 d. 69760

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

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 :