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How many strings of eight uppercase English letters are there if no letter can be repeated?

How many strings of eight uppercase English letters are there if no letter can be repeated?
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How many strings of eight uppercase English letters are there if no letter can be repeated?

User Ddieppa
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26*25*24*23*22*21*20*19 which is 62,990,928,000 strings.
User Alp Altunel
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