sammyhehe sammyhehe

14-11-2016
Mathematics

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

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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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