Statistics - Poisson distribution.

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(Not sure if I should have posted this in the h/w problem section since it's not really hw...just a problem I've faced recently. But if it should be there, I can move it there. )

There are 5 boxes.

Each box may contain a certain amount of marbles (1, 2, 3 etc.) and some have no marbles at all. You know that 2 of the 5 boxes contain no marbles at all. No other information is given.

Using the poisson distribution, approximately how many marbles are there estimated to be total in the 5 boxes?

How would any of you guys would go about solving this problem?

 

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Nevermind, I figured it out.

Not sure how to delete this post though...