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## Homework Statement

Suppose that X takes on one of the values 0, 1, and 2. If for some constant c, P{X = i} = cP{X = i - 1}, i = 1, 2. Find E [X]

## Homework Equations

## The Attempt at a Solution

I'm not sure how to start this. A push in the right direction would be awesome.

Thanks!