The distribution of warfare over time was studied by a researcher. He deduces from the data that the number of wars that start in a given year follows a approximately  Poisson distribution with a parameter λ=2.8. Find the probability that the following number of wars will occur if a calendar year is chosen at random: Zero At most two More than 7 At most 10 Less than 6

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The distribution of warfare over time was studied by a researcher. He deduces from the data that the number of wars that start in a given year follows a approximately  Poisson distribution with a parameter λ=2.8. Find the probability that the following number of wars will occur if a calendar year is chosen at random:

  1. Zero
  2. At most two
  3. More than 7
  4. At most 10
  5. Less than 6
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