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How many different four-letter secret codes can be formed if the first letter must be an S or a T?
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How many different four-letter secret codes can be formed if the first letter must be an S or a T?

User Yecenia
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1 Answer

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If it’s all CAPS: The 1st letter is 1 of 2, then 1/26, 1/26, 1/26 - - ->2*26*26*26
User Antoine Augusti
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