5 days are **possible Schedule** are there to play hockey on Wednesday or Monday or both.

Let's solve the problem with the help of the **Set theory**.

Let Set A be the given days Bob only plays hockey.

Set A = { Tuesday, Wednesday, Friday}

Let Set B be the given days Ron only plays hockey.

Set B = { Thrusday, Sunday}

So, (Set A \cap Set B ) = 0 (Null Set) which denotes days in which both of them play together.

(Set A \cup Set B ) = { Tuesday, Wednesday, Thursday, Friday, Sunday} > which denotes days in each week at least one of them plays hockey.

**Set theory** is the branch of mathematical logic that studies sets, which can be informally described as sets of objects. All sorts of objects can be grouped into sets, but set theory as a branch of mathematics deals mainly with mathematics as a whole.

**Set theory** is the branch of mathematical logic that studies sets, which can be informally described as collections of objects. All sorts of objects can be grouped into sets, but set theory as a branch of mathematics deals mainly with mathematics as a whole.

Learn more about **Set theory** here: brainly.com/question/13458417

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