the aggregate of two or more numbers, magnitudes, quantities, or particulars as determined by or as if by the mathematical process of addition: The sum of 6 and 8 is 14. a particular aggregate or total, especially with reference to money: The expenses came to an enormous sum.
He can wear 8 different outfits, I got this answer by using the sample space method which I prefer over the tree diagram since I believe it takes up less time.
