- #1
orangesun
- 16
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Homework Statement
Hi, if you could offer help to any of these questions, it would be great, i was unable to attend my lectures this week and I had no idea how to do these.
The joint pmf of x and y is p x,y = c(x^2 + y^2) x,y = 1,2,3 Find:
a. c and the marginal pmfs of x and y
b. e(x)
c. the pmf of 3x-2y
d. e(3x-2y) in two ways
Homework Equations
The Attempt at a Solution
From first investigation, I think that I have to create a table with
1,1 1,2 1,3
2,1 2,2, 2,3
3,1 3,2 3,2
and x^2 + y^2 = 1 and the p = 1/9 since there's only 9 options.
i have no idea how to continue.