Question

Parcels from sender S to receiver R pass
sequentially through two post-offices. Each post-
office has a probability 1/5 of losing an incoming
parcel, independently of all other parcels. Given
that a parcel is lost, the probability that it was lost
by the second post-office is
​

Answer 1

Answer:

6/25

Step-by-step explanation:

The answer should be 1/5+ 1/5 of 1/5=1/5+1/25=6/25

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