Calculate event probabilities with our free online mathematical calculator. Perfect for statistics, probability theory, and analyzing the likelihood of outcomes.
Enter the number of favorable and total outcomes to calculate probability
Follow these simple steps to calculate event probabilities and statistical outcomes
Determine the number of outcomes that match your desired event.
Calculate the total number of possible outcomes in the sample space.
View probability as decimal, percentage, odds, and complement.
Comprehensive probability tools for statistical analysis and mathematical calculations
View probability as decimal, percentage, odds, and complementary probability.
Perfect for probability theory, statistics courses, and research analysis.
Ideal for students learning probability concepts and statistical methods.
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Common probability scenarios and their calculations for better understanding
| Event | Favorable | Total | Probability |
|---|---|---|---|
| Rolling a 6 on a die | 1 | 6 | 16.67% |
| Drawing an Ace from deck | 4 | 52 | 7.69% |
| Flipping heads on coin | 1 | 2 | 50.00% |
Common questions about probability calculations and statistical analysis
Probability is the likelihood that an event will occur, expressed as a number between 0 and 1, or as a percentage between 0% and 100%. A probability of 0 means the event will never occur, while 1 means it will always occur.
Probability = Favorable Outcomes / Total Possible Outcomes. For example, the probability of rolling a 6 on a standard die is 1/6 or approximately 16.67%.
Probability is the ratio of favorable outcomes to total outcomes. Odds are the ratio of favorable outcomes to unfavorable outcomes. For example, a 25% probability equals odds of 1:3.
Complementary probability is the probability that an event will NOT occur. It equals 1 minus the probability of the event occurring. If P(A) = 0.3, then P(not A) = 0.7.
No, probability cannot be greater than 1 (or 100%). If your calculation gives a result greater than 1, check that your favorable outcomes don't exceed total outcomes.
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