The probability that an idividual suffer...

The probability that an idividual suffers a bad reaction from an injection is `0.001`. The probability that out of 2000 individulas exactly three will suffer bad reaction is

`(1)/(e^(2))`

`(2)/(3e^(2))`

`(8)/(3e^(2))`

`(4)/(3e^(2))`

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