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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?
Wiki User
∙ 9y ago
If the first letter must be an s or t, then the remaining three letters can be any letters at all. This means there are 26 possible entries for each of those spots. The total number of combinations is then 2 x 6 x 26 x 26 or 35,152.
Wiki User
∙ 9y ago
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How many different 2 letter codes can be formed using th 26 letters of alphabet and must be different?
The first letter can be any one of 26 letters. For each of those . . .The second letter can be any one of the remaining 25 letters.There are (26 x 25) = 650 different 2-letter codes.
How many different four-letter secret codes can be formed if the first letter must be an S or a T?
If the first two letters must be an S or a T, then there are three remaining places that can be one of 26 letters. This is equal to 26 * 26 * 26 * 2, or 35,152 possible combinations.
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