How many 3-letter codewords can be formed if: At least one of the letters is to be chosen from the vowels? _____ Exactly two are vowels? _____ All are consonants? ___
How many 3-letter codewords can be formed if: At least one of the letters is to be chosen from the vowels? _____ Exactly two are vowels? _____ All are consonants? ___
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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How many 3-letter codewords can be formed if:
- At least one of the letters is to be chosen from the vowels? _____
- Exactly two are vowels? _____
- All are consonants? ___
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