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Question

The incidence of an occupational disease to the workers of a factory is found to be 15000 . If there are 10,000 workers in a factory then the probability that none of them will get the disease is

A
e1
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B
e2
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C
e3
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D
e4
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Solution

The correct option is B e2
By using Poisson distribution,
P(x;μ)=eμμxx!
μ: The mean number of successes that occur in a specified region.
x: The actual number of successes that occur in a specified region.
P(x;μ ): The Poisson probability that exactly x successes occur in a Poisson experiment, when the mean number of successes is μ
μ=10000×15000=2
x=0
P(0;2)=e2200!=e2

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