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EXERCISES 3.1.9. Use what you have learned about permutations to work out the following problems. The sum and/or product rule may also be required. How many 3-letter "words" (strings of characters, they don't actually have to be words) can you form from the letters of the word STRONG? How many of those words contain an s? (You may not use a letter more than once.)

EXERCISES 3.1.9. Use what you have learned about permutations to work out the following problems. The sum and/or product rule may also be required. How many 3-letter "words" (strings of characters, they don't actually have to be words) can you form from the letters of the word STRONG? How many of those words contain an s? (You may not use a letter more than once.)

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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EXERCISES 3.1.9. Use what you have learned about permutations to work out the following problems. The sum and/or product rule may also be required. How many 3-letter "words" (strings of characters, they don't actually have to be words) can you form from the letters of the word STRONG? How many of those words contain an s? (You may not use a letter more than once.)
Transcribed Image Text:EXERCISES 3.1.9. Use what you have learned about permutations to work out the following problems. The sum and/or product rule may also be required. How many 3-letter "words" (strings of characters, they don't actually have to be words) can you form from the letters of the word STRONG? How many of those words contain an s? (You may not use a letter more than once.)
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