Re: probability questione

In article <42fc9eb9$0$158$edfadb0f@xxxxxxxxxxxxxxxxxxxx>, Sidike
<Sidike@xxxxxxxxxx> wrote:

> Assume that we have five groups with respectively 10,20,30,40, and 50 people
> in the group.
> Choose a group randomly (that is every group have same probability of being
> chosen). Choose afterwards a person randomly from the chosen group.
>
> a) Give for every of the 5 groups the probability that a person in this
> group is chosen.
>
>

What have you done so far?
.

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