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1. If all the events have the same probability of happening, then the distribution is called what? 2. What we expect to happen is based on a theoretical probability distribution, but what actually happens is called what? 3. The probabilities of all possible outcomes will always sum to what? 1. If all the events have the same probability of happening, then the distribution is called what? 2. What we expect to happen is based on a theoretical probability distribution, but what actually happens is called what? 3. The probabilities of all possible outcomes will always sum to what