a)How many different numbers of 4 digits may be formed with the dgits 0,1,2,5,6,7,8 if no digit is used more than once in any number?(adsbygoogle = window.adsbygoogle || []).push({});

b)Find the sum of all he numbers formed in (a).

I know how to do the part a), but I'm totally stump when I see part b).

Thanks.

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# Homework Help: How many different 4-digit numbers can be formed here

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