Formula

AnTon

New Member
#1
Hi,

Does anyone know the formula used to calculate this

Random Variable X has mean 20 and standard deviation 5. Random variable Y has mean 35 and standard deviation 15. What would the mean and standard deviation of random variable X + Y?

I know there's a formula for this type of problem somewhere. I just don't remember it. Can someone tell me it or inform me what topic of stats it's under?

Thanks,
Tony