The expected number of typographical errors on a page of a certain magazine is H 0.30...

Question

Question

Answer 1

Answer #1

Let X denotes the number of typographical errors on a randomly selected page.

X ~ Poisson( mu = 0.75 )

The probability mass function of X is

$P(X=x) = rac{e^{-0.75}*0.75^x}{x!},x=0,1,2,....$

a) The probability that there is exactly one typographical error

P(X = 1)

e-0.15 * 0.75 i

-0.354275

b) The probability that there is at least one typographical error

=P(Xgeq 1)

= 1 - P(X = 0)

1-0.472367

= 0.527633

Answer 2

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