DanielDaniels
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Hello.

I am not sure here why the answer is not working out.
I used poisson with mean 3.5 and to find the P(X=1) and not working.
I also tried with X=4 and also not.

The question is attached. Thank you
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ghostwalker
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(Original post by DanielDaniels)
Hello.

I am not sure here why the answer is not working out.
I used poisson with mean 3.5 and to find the P(X=1) and not working.
I also tried with X=4 and also not.

The question is attached. Thank you
It's talking about the same hour. If it was the next hour then P(X=1) would be correct.

Here you've looking at conditional probability. What's the probability that exactly four occurred, given that at least three occurred.
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DanielDaniels
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(Original post by ghostwalker)
It's talking about the same hour. If it was the next hour then P(X=1) would be correct.

Here you've looking at conditional probability. What's the probability that exactly four occurred, given that at least three occurred.
Thank you for your assistance. Yes I see. Therefore we have
P(X=4)/P(X>=3)

Correct?
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ghostwalker
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(Original post by DanielDaniels)
Thank you for your assistance. Yes I see. Therefore we have
P(X=4)/P(X>=3)

Correct?
Agreed.
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wilooo
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i clicked on this thinking it would be something weird about fish but boy was i wrong lol.
(poisson is fish in french) (or something similar i didnt use that word much)
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ghostwalker
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(Original post by wilooo)
i clicked on this thinking it would be something weird about fish but boy was i wrong lol.
(poisson is fish in french) (or something similar i didnt use that word much)
:facepalm2:
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Qxi.xli
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(Original post by wilooo)
i clicked on this thinking it would be something weird about fish but boy was i wrong lol.
(poisson is fish in french) (or something similar i didnt use that word much)
omg lmao
Its FurtherMaths A-level
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DanielDaniels
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(Original post by ghostwalker)
Agreed.
Thank you
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wilooo
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(Original post by Qxi.xli)
omg lmao
Its FurtherMaths A-level
lol thanks i was so confused
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davros
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(Original post by wilooo)
i clicked on this thinking it would be something weird about fish but boy was i wrong lol.
(poisson is fish in french) (or something similar i didnt use that word much)
(Original post by ghostwalker)
:facepalm2:
(Original post by Qxi.xli)
omg lmao
Its FurtherMaths A-level
when I was at uni, one of my supervisors' favourite hints when trying to get us to use a particular probability distribution for a question was "one man's meat is another man's Poisson". It wasn't funny then, and it isn't funny now
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