A. diserete merobability fametion o. dibcrele random variable called a a. probability distribution b. random variance c. random variable 23. Which or the following is not a required condition for a discrete probability function? d. expected value a. r(x)0 for all values of x b. f(x)=1 for all values of x e. f(x)=0 for all values of x d. f(x)1 for all values of x.