The Probability Calculator helps you compute the likelihood of single events, multiple events, and outcomes across repeated trials. It supports basic scenarios such as “A and B both occurring,” “At least one event occurring,” and “Exactly one event occurring,” as well as series-based outcomes like “A always occurring,” “A never occurring,” and “A occurring at least once” over multiple trials.

This tool is useful for probability theory, statistics, risk analysis, and everyday decision-making where event likelihoods need to be estimated. By entering event probabilities and trial numbers, you can quickly evaluate outcomes for single or combined events with clear, structured results.

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