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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?
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.
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.