# hw10 - CS 330 Discrete Computational Structures Fall...

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CS 330 : Discrete Computational Structures Fall Semester, 2014 Assignment #10 Due Date: Sunday, Nov 23 Suggested Reading: Rosen Sections 6.1 - 6.3. These are the problems that you need to turn in. Always explain your answers and show your reasoning. Spend time giving a complete solution. You will be graded based on how well you explain your answers. Just correct answers will not be enough! 1. [6 Pts] An ISU Computer Science shirt is sold in 9 colors, 5 sizes, striped or solid, and long sleeve or short sleeve. (a) How many different shirts are being sold? (b) What if the black and yellow shirts only come in short-sleeve and solid? 2. [12 Pts] (a) How many different four-letter codes can there be? (b) What if letters cannot be repeated? (c) What if letters cannot be repeated, and one of the initials is K? (d) What if letters can be repeated and at least one of the initials is K? 3. [6 Pts] How many integers between 10000 and 99999, inclusive, are divisible by 5 or 7?

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• Fall '15
• Soma Chaudhuri
• pts, How Many Ways, National Film Registry

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