First slide

Random variable and probability distribution

Question

The probability that an individual suffers a bad reaction from an injection is 0.01. The probability that out of 1000 individuals more than 1 suffer a bad reaction is

Moderate

A

$\frac{5}{e^{2}}$
B

$1 - \frac{5}{e^{2}}$
C

$1 - \frac{4}{e^{2}}$
D

$1 - \frac{11}{e^{10}}$

Solution

$λ = 1000 (0.01)$
$λ = 10$

$p (X > 1) = 1 - p (X = 0) - p (x = 1)$

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