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all TELUS @6296.. 11:05 AM acorn.acadiau.ca You are logged in as Brittany Elizabeth Duff In a large population of female beaver, at any one time 30% are pregnant. A biologist requires a sample of 3 pregnant beavers to test their nutrition levels through blood samples. Find the probability of success. (answer to 1 decimal place) Find r (number of successes). (answer as integer) Find the expected number of non- pregnant female beaver that must be sampled in order to obtain 3 pregnant beaver. (answer as integer) Find the expected number of female beaver that must be sampled in order to obtain 3 pregnant beaver. (answer as integer)

Explanation / Answer

Probability of success = 0.30

Number of success = 3

Given that 30% women are pregnant that means we expect to find 3 pregnant women if we take a sample of 10. Hence,

Expected number of non - pregnant female beaver need to be sampled = 7

Expected number of females need to be sampled = 10

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