Sets & Logics - Which forum?

[ranbow129]

Hello! I'm new to this site and in my college math class we're studying 'sets and logic'. I have no idea what it is and the book isn't being helpful about the questions I have! I was wondering which forum I might post my questions about this type of math in? I didn't see one titled 'sets and logic' and am not sure if it's a sub-type that fits into a more well-known topic.

Thank you!

Edit;
Examples of the questions:
* Let n(A) = 25, n(b) = 35, and n(AᴖB) = 5. Find n(AᴗB).

* A pizza parlor offers the following toppings:
Pepperoni, sausage, green peppers, onions, mushrooms, and black olives.
Determikne the number of ways a pizza can be ordered with some, none, or all of the toppings.

​

 

[JeffM]

Hello! I'm new to this site and in my college math class we're studying 'sets and logic'. I have no idea what it is and the book isn't being helpful about the questions I have! I was wondering which forum I might post my questions about this type of math in? I didn't see one titled 'sets and logic' and am not sure if it's a sub-type that fits into a more well-known topic.

Thank you!

Edit;
Examples of the questions:
* Let n(A) = 25, n(b) = 35, and n(AᴖB) = 5. Find n(AᴗB).

* A pizza parlor offers the following toppings:
Pepperoni, sausage, green peppers, onions, mushrooms, and black olives.
Determikne the number of ways a pizza can be ordered with some, none, or all of the toppings.

​

Put it in Advanced Math AFTER you read READ BEFORE POSTING

 

[pka]

I have no idea what it is and the book isn't being helpful about the questions I have! I was wondering which forum I might post my questions about this type of math in? I didn't see one titled 'sets and logic' and am not sure if it's a sub-type that fits into a more well-known topic. Edit;
Examples of the questions:
* Let n(A) = 25, n(b) = 35, and n(AᴖB) = 5. Find n(AᴗB).​

You should know that \(\displaystyle n(A\cup B)=n(A)+n(B)-n(A\cap B)\).