The probability of certain event is 1 true or false
- The probability of sure event is 1 true or false
- The probability of impossible event is 1 true or false
- The value of the probability of a certain event is 1 true or false
- The probability of an event is greater than 1 true or false
- The sum of probability of all elementary event is 1 true or false
- Probability of event
- Calculate probability of an event
- Probability of two events