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Alinara [238K]
3 years ago
5

principle is used to find the number of strings of eight uppercase English letters that start or end with the letters BO (in tha

t order), if letters can be repeated.
Mathematics
1 answer:
yKpoI14uk [10]3 years ago
5 0
There are 6 other positions in the string, each with 26 choices. So if you fix BO as the first two letters, there are 26^6 possible strings that you can make.

If BO is at the end of the string, you still have 26^6 possible strings.

Together, then, you have 2\times26^6 possible strings.
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Since the triangle is equilateral then the 3 sides are congruent.

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