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3. How many 4-letter code can be formed using the first 10 letters of the English alphabet, if no letter can be repeated?
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May 8, 2023
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3. How many 4-letter code can be formed using the first 10 letters of the English alphabet, if no letter can be repeated?
Mathematics
high-school
Kchoi
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Abcdefg
There cannot be more than two because there are only two vowels, e and a. But it has to be 4 lettered, which limits a lot of option, so there can only be one 4-letter code.
Fleshgrinder
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May 14, 2023
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