joint probability
Technical term in probability theory and statistics; refers to the probability of two or more events occurring together.
To calculate the joint probability, you need the joint distribution.
Conditional probability, the probability of an event given that another event has occurred, whereas 結合確率 is the probability of both events occurring together.
Marginal probability, the probability of a single event without reference to others, derived from the joint probability distribution.
Compound of 結合 (ketsugō, 'combination, union') and 確率 (kakuritsu, 'probability'). A straightforward technical term.