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Mathematics 14 Online
OpenStudy (anonymous):

in the united states radio and tv stations use call letters that start with K or W. How many different call letters with four letters are possible?

OpenStudy (alexwee123):

can letters be repeated?

OpenStudy (anonymous):

it has to start k or w

OpenStudy (alexwee123):

k lets assume that they can be repeated so |dw:1336709099618:dw|

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