### Video Transcript

If ๐ is the set of math teachers in a school and ๐ is the set of science teachers in the school, what could be the universal set that contains ๐ and ๐?

The universal set ๐ข. The universal set is a set containing all elements and of which all other sets are subsets, meaning theyโre within the universal set. So ๐ is the set of math teachers. And ๐ is the set of science teachers. So where could both of these teachers belong?

Hereโs a Venn diagram to represent the set ๐ and ๐, the math teachers and the science teachers. And there may be a few teachers who teach math and science. So- so what could be the universal set that holds all of this? It would need to be all of the teachers in the school because the math teachers would be a subset of all of the teachers and the science teachers would be a subset of all of the teachers. Therefore, ๐ข is the set of all teachers.