random variables

[Leons]

hi, I just want to ask something (I only know how to calculate it, but I don't know is it really useful in our life)

Can anyone explain to me and give example about random variables that involves in our daily life? what are the uses of it? and how to find conditional distribution, marginal distribution and joint distribution from that?

 

[blamocur]

Most numerical values in our life are, to various degree, random. E.g., amount of rain to expect, or the time it will take me to get to the store.
Figuring out various distributions is typically done using various methods of mathematical statistics after collecting enough empirical data.
Does this answer your question?

 

[Steven G]

Randoms Variables are used in a branch of mathematics call Operations Research, as well as many other fields of mathematics. If your goal is to make money, then go into this field.