joint probability

noun2

1. •
   The probability that two events will occur simultaneously.

   • Given two events A and B in the same probability space with P(B)>0, the conditional probability of A given B is defined as the quotient of the unconditional joint probability of A and B, and the unconditional probability of B.ᵂᴾ
2. •
   The probability distribution of a random variable whose sample space is the Cartesian product of the sample spaces of its (at least two) component random variables.