Show that if X P o ( 1 ) and Y P o ( 2
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Show that if X ∼ Po(λ1) and Y ∼ Po(λ2), then X + Y ∼ Po(λ1 + λ2).
Transcribed Image Text:
Pr(X + Y ≤ z) = Pr(X ≤z-yY= y)Pr(Y = y) y=0 11 y=0 dĩ e-site-re -1₂ (z - y)! y!
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