>>11017043op, this is a set of protocols used to define probability in a Venn diagram, where you have 2 overlapping circles.
P(A) means the probability of one of the circles
P(A U B) means the whole thing "U"nion
P (A n B) means the I"n"tersection, the part in between
not sure about the other fucks, I think its P(A'B) with an apostrophe to show only in A but I might've been taught differently
