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A secret code must consist of three capital letters followed by a digit. Letters cannot be repeated. How many secret codes are possible?
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A secret code must consist of three capital letters followed by a digit. Letters cannot be repeated. How many secret codes are possible?

User Nicholas G Reich
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2 Answers

4 votes
There are 36 values (26 letters of the alphabet + all numbers 0-9) and four digits. If there are only 10 values and four digits there are 10,000 combinations. So multiple the value of that by 3.6 and you get your answer. 36,000
User Boris Ivanov
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8.0k points
2 votes
The answer is 156,000.
User Darrick
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8.3k points
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