how do i find pdf calculating pdfs what is x_i how do you figure the pdf distribution how to find pdf distribution x what are the distributions for rvs? what is the exponential distribution of x and y which rv is the pdf calculating pdfs what is the exponential distribution of $X_i what is the exponential distribution of $x_i how to find out an exponential distribution of pdf in x rv what is a pdf with a distribution of the rv? excel how to compute pdf of rv what is the exponential distribution in pdf calculating pdf of rv what is pdf what is the exponential distribution of rv x? which of these functions is the exponential distribution for the pdf? how to compute pdf