# Math Help - Marginal Probabilities of a discrete 2 dimensional variable

1. ## Marginal Probabilities of a discrete 2 dimensional variable

Hi everybody,

I attached a pdf file with an exercise (calculate marginal distributions). I have issues understanding how to get the result in the discrete case (result should be correct though as I have it from a book).
Also I solved the exercise for the continuous case (out of curiosity) and got another result. Why is that?

The calculations are in the pdf file.

I would be very glad if someone could help.

Many thanks,
Fab

2. ## Re: Marginal Probabilities of a discrete 2 dimensional variable

Can somebody help here?

many thanks,
Fabien