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The probability of a randomly selected adult in one country being infected by certain virus is 0.003.
In tests for the virus, blood samples from 12 people are combined. a What is the probability that
the combined sampled tests positive for the virus? P(sample tests positive) = b Is it unlikely for
such a combined sample to test positive? (Note combined sample tests positive if at least one
person has the virus)

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The probability of a randomly selected adult in one country .pdf

  • 1. The probability of a randomly selected adult in one country being infected by certain virus is 0.003. In tests for the virus, blood samples from 12 people are combined. a What is the probability that the combined sampled tests positive for the virus? P(sample tests positive) = b Is it unlikely for such a combined sample to test positive? (Note combined sample tests positive if at least one person has the virus)