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
e−1
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B
e−2
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C
e3
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D
e4
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Solution
The correct option is Be−2
By using Poisson distribution,
P(x;μ)=e−μμxx!
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