Represent finite sample spaces for simple one- and multi-step experiments using organized lists, tables, and tree diagrams, and calculate theoretical probabilities by counting equally likely favorable outcomes out of all outcomes. Determine probabilities of complementary, mutually exclusive, and independent compound events using complements, addition, and multiplication, including simple “at least one” situations while excluding conditional probability and dependent events. Calculate experimental probabilities and use simulations to estimate them, then compare experimental and theoretical values in fractions, decimals, percentages, tables, or graphs while explaining random variation and the stabilizing effect of more trials.