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+1 vote

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

\[\begin {array} {1 1} (a)\;\frac{1}{e^2} & \quad (b)\;\frac{2}{3e^2} \\ (c)\;\frac{8}{3e^2}& \quad (d)\;\frac{4}{3e^2} \end {array}\]

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1 Answer

+1 vote
$(d)\;\frac{4}{3e^2} $
answered Nov 7, 2013 by pady_1

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