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Mathematics, 28.03.2020 00:56 yoselinruiz

Jill and Sabrina can write a lab report together in $6$ hours. If all people work at the same rate, how many hours would it take to write a lab report if Kelly joins Jill and Sabrina?

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Jill and Sabrina can write a lab report together in $6$ hours. If all people work at the same rate,...
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