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craig · #1 November 2nd, 2009, 12:20 PM

Hi, hopefully someone can help me with this question, not sure what it is I'm supposed to do exactly.

Let $X_1$ and $X_2$ be independent random variables with common distribution defined by:

$X =$
0, with probability $\frac{1}{8}$
1, with probability $\frac{3}{8}$
2, with probability $\frac{1}{2}$

Find the distribution of the sum of $X_1 + X_2$

Hopefully someone can point me in the right direction with this

Craig