a) A bag contains 8 red balls and 5 blue balls. In how many ways can 3 red balls and 4 blue balls be drawn? b) Find the volume of the parallelepiped whose concurrent edges are represented by the…

a) A bag contains 8 red balls and 5 blue balls. In how many ways can 3 red balls and 4 blue balls be drawn? b) Find the volume of the parallelepiped whose concurrent edges are represented by the vectors $i - 2 j + 3 k$ , $- 3 i + 4 j - 5 k$ , and $i + 2 j - 3 k$ .

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