The intersection of two sets has only the elements common to **both** sets.

If an element is in just one set it is **not** part of the intersection.

The symbol is an **upside down U** like this: **∩**

Example: The intersection of the "Soccer" and "Tennis" sets is just casey and drew (only casey and drew are in both sets), which can be written:

**Soccer ∩ Tennis = {casey, drew}**

See: Union