Mathematics, 19.02.2021 01:10, tiffuuu

Suppose that 20% of a herd of cows is infected with a particular disease. (a) What is the probability that the first diseased cow is the 3rd cow tested?
(b) What is the probability that 4 or more cows would need to be tested until a diseased cow?

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Suppose that 20% of a herd of cows is infected with a particular disease. (a) What is the probabili...