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anonymous
 one year ago
Find the number of possible call letters of a radio station (7 letters long) if the first letter must be a W or a K and no letter is repeated.
anonymous
 one year ago
Find the number of possible call letters of a radio station (7 letters long) if the first letter must be a W or a K and no letter is repeated.

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Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0ok, there are 7 letters total, and for the first letter we have 2 possibilities for the second letter we have 25 possibilities since we already used one and then we keep going until we get to the 7th letter, giving us: 2*25*24*23*22*21*20
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