Question

Please help

Answer 1

We need to find \(|A\setminus (B\cup C)|\). This becomes:
\[
|A|-|B\cap A|-|C\cap A|+|B\cap C|
\]
Where \(|A|\) denotes the cardinality of set \(A\).

Try to use that.

Answer 2

Wait, change that last "\(B\cap C\)" into: \(A\cap B\cap C\)

Answer 3

5

Answer 4

Hmm... I get 4 for this. Could you show how you got 5?