# Distributions

#### shobhit

##### New Member
1. Let X and Z be binary random variables with P(X = 1) = p and P(Z = 1) = p. Under which conditions can the distribution of Z + X be (easily) computed, and what are the distribution results? Give mean and variance of X + Z.

#### Dason

Hi! We are glad that you posted here! This looks like a homework question though. Our homework help policy can be found here. We mainly just want to see what you have tried so far and that you have put some effort into the problem. I would also suggest checking out this thread for some guidelines on smart posting behavior that can help you get answers that are better much more quickly.

#### hlsmith

##### Not a robit
I think I learned last week that binary distributions are traditionally pr(....) and continuous are p(....). Just sharing. Oh yeah - what Dason said.

#### shobhit

##### New Member
I did not understand how to approach this problem that is why i posted it straightforward with working it out , It would be really helpful if someone help me with the initial idea .

#### hlsmith

##### Not a robit
Well you have binary random variables, so I would imagine you are dealing with the binomial distribution.