Mathematics
Mathematics, 05.11.2020 01:00, rorob

Kirti knows the following information from a study on cold medicine that included 606060 participants: 303030 participants in total received cold medicine.
262626 participants in total had a cold that lasted longer than 777 days.
141414 participants received cold medicine but had a cold that lasted longer than 777 days.

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Kirti knows the following information from a study on cold medicine that included 606060 participant...

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