# Joint probability

To write “the chance that both X and Y are true” us­ing stan­dard Prob­a­bil­ity no­ta­tion, we write $$\mathbb{P}(X \wedge Y)$$ or $$\mathbb{P}(X, Y)$$.

Parents:

• Probability

The de­gree to which some­one be­lieves some­thing, mea­sured on a scale from 0 to 1, al­low­ing us to do math to it.