Mathematics · Probability Theory and Trials

Which of the following statements regarding probability concepts and trials are correct? A. A probability mass function P(Xi) for a discrete random variable must satisfy the condition that the sum of all individual probabilities is equal to 1. B. An elementary event, also referred to as a simple event, is defined as an event containing only a single sample point, typically represented as a singleton set. C. Bernoulli trials are characterized by a series of independent experiments where the probability of success remains constant and each trial results in two mutually exclusive outcomes. D. Events are classified as exhaustive when there is no inherent bias in the experiment and there is no specific reason to anticipate one outcome appearing more frequently than another. Choose the most appropriate answer from the options given below: