Question Number 210432 by hardmath last updated on 08/Aug/24
$$ \\ $$How many different five-digit numbers can be written from the digits 1,2,3,4,5,6,7,8 if the digits are not repeated?
Answered by mr W last updated on 09/Aug/24
$${P}_{\mathrm{5}} ^{\mathrm{8}} =\mathrm{8}×\mathrm{7}×\mathrm{6}×\mathrm{5}×\mathrm{4}=\mathrm{6720} \\ $$
Commented by hardmath last updated on 11/Aug/24
$$\mathrm{thankyou}\:\mathrm{dearprofessor} \\ $$