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Introduction to Probability


Need help in probability math?

These lessons on probability will include the following topics: Samples in probability, Probability of events, Theoretical probability, Experimental probability, Probability problems, Tree diagrams, Mutually exclusive events, Independent events, Dependent events, Factorial, Permutations, Combinations, Probability in Statistics, Probability and Combinatorics.

What is Probability?

Probability is the study of chance or the likelihood of an event happening. Directly or indirectly, probability plays a role in all activities.

For example, we may say that it will probably rain today because most of the days we have observed were rainy days.

However, in mathematics, we would require a more accurate way of measuring probability.

  • Probability Lessons
    Topics: Probability scale, Expected frequency, Bags of balls, Mutually exclusive events, Possibility space diagrams, Independent events, Balls in bag problems with two picks, Tree diagrams, Without replacement problems.

Probability used in Statistics

Probability and Combinatorics Videos


Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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