Unformatted text preview: rule, the answer is 3 x 4 = 12. (b) [BB] This time she must choose either a morning or an afternoon course. There are 4 + 3 = 7 choices. 2. (a) By the addition rule, there are 2 + 2 + 6 = 10 choices of molding. (b) By the multiplication rule, there are 2 x 4 = 8 choices of metal molding, 2 x 4 = 8 choices of wood molding and 6 x 4 = 24 choices of plastic molding. By the addition rule, the consumer can choose any of 8 + 8 + 24 = 40 moldings. 3. [BB] 10 x 9 x 8 = 720. 4. (a) There are nine choices for the first digit, nine for the second and eight for the third; in all 9 x 9 x 8 = 648 numbers. (b) There are five choices for the last digit, then eight choices for the first and eight choices for the middle; in all, 5 x 8 x 8 = 320 numbers....
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 Summer '10
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 Graph Theory, Sets, Natural number, Mathematical logic, IAI

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