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Keiko has seven colors of lanyard. she uses threee different colors to make a key chain. how many different combinations can she choose

Keiko has seven colors of lanyard. she uses threee different colors to make a key chain. how many different combinations can she choose
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keiko has seven colors of lanyard. she uses threee different colors to make a key chain. how many different combinations can she choose

User Daniel Bramhall
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1 Answer

6 votes
The answer is 21 different combinations
User Giolekva
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