What is probability function??

Answer the following questions: What is probability mass function of a random variable?

What is this ? probability function

A random variable has the following probability distribution : Does it represent a probability function?

A random variable has the following distribution : Does it represent a probability function ?

Write the probability function of Binomial Distribution

Statement 1 : The plots of probability density and radial probability function versus distance r from the nucleus for any particular orbital are not identical, Statement 2 : Probability density is psi^(2) whereas radial probability function represents probability of finding the electron in a shell of thickness dr.

A discrete random variable X has probability mass function P(x) then