what is probability mass function which is a function of a probability mass function what is an example of a probability mass function why use r$ as a probability mass function what is probability mass of the variable how to find an example of a probability mass function why would you use a probability mass function? what does r$ represent in probability mass what is the mapping of two probability masses how to find a probability mass function what is the probability of p$ what is q$ and p$ what is probability mass function what is the mapping of probability mass what is r a probability mass function examples $r is a probability mass function of the variable of if we map a function of the probability mass function to another function, the following statements will be used in the calculation of the mass function. which is the probability of an exponential distribution? which function is a probability mass function which probability mass function of $r$ is an example of a random variable