Math, asked by saisivani14, 7 months ago

the number of four digit telephone numbers having at least one of their digits repeated is​

Answers

Answered by santhiprasanthi188
0

Answer:

10^4-1-10P4

=10000-1-10!/(10-4)!

=9999-10×9×8×7

=9999-5040

=4959

Answered by skmunwar79
0

Answer:

Step-by-step explanation:

Similar questions