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Suppose 1% of people don’t have immunity against a new virus. Let P be the probability...

Suppose 1% of people don’t have immunity against a new virus. Let P be the probability that there are 2, 3 or 4 people without immunity in a random sample of 100 people.
   a) Use binomial distribution to find P.
  b)Use normal approximation to the binomial distribution to find P .
  c) Use Poisson distribution to find P .

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