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Calculate Poisson probability (#850)
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Calculate Poisson probability (#850)
Use
P
(
X
=
r
)
=
e
−
λ
λ
r
r
!
P(X=r) = e^{-\lambda} \frac{\lambda^r}{r!}
P
(
X
=
r
)
=
e
−
λ
r
!
λ
r
.