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Mathematics, 31.10.2019 04:31 curlyheadnikii

Ascientist inoculates mice, one at a time, with a disease germ until he finds 3 that have contracted the disease. if the probability of contracting the disease is two sevenths , what is the probability that 8 mice are required? the probability that that 8 mice are required is nothing.

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Ascientist inoculates mice, one at a time, with a disease germ until he finds 3 that have contracted...
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