I'm trying to understand these "fill in the blanks" but don't seem to understand it, could anyone help me figure out the blanks?

Consider the universal set U and a subset A of U. The set of all the elements of U which are not included in A is called the ____________ ________________________the set A.

If Card(A B) Card(A) Card(B) = + , then we know that_____________________ .___________________.

If two events A and B are _______________ then the probability of A and B occurring simultaneously is calculated using the following formula: P(A and B) = P(A) P(B).

When calculating the probability that event A will occur, knowing that event B has already occurred, the universal set of possible outcomes is reduced to _______________________.