sammyhehe
sammyhehe sammyhehe
  • 14-11-2016
  • Mathematics
contestada

How many four digit numbers can be formed from the numbers 1,3,4,6,8 and if repetition of number is not allowed?

Respuesta :

beccasch1008
beccasch1008 beccasch1008
  • 14-11-2016
a lot... 

Total even numbers: 4⋅6⋅5⋅4=4804⋅6⋅5⋅4=480

Total 3-digit even numbers: 3⋅5⋅4⋅1=603⋅5⋅4⋅1=60

Total 4-digit even numbers: 480−60=420


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