Joint Probability vs Conditional Probability

‌Joint Probability

Joint probability is the likelihood of more than one event occurring at the same time P(A and B). The probability of event A and event B occurring together. It is the probability of the intersection of two or more events written as p(A ∩ B).

Example: The probability that a card is a four and red =p(four and red) = 2/52=1/26. (There are two red fours in a deck of 52, the 4 of hearts and the 4 of diamonds).

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