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Mathematics, 08.07.2021 08:00 akp24

There are seven people online and each person uses either a blue, black, or red pen to write while working. How many possible combinations can be made? A. 49

B. 28

C. 21

D. 10

A S A P!! I DONT WANT MY DAD YELLING AT ME FOR THIS ;^;

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Answers: 3

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