need notes on notation's and how to get the answers
To get answers you read off the venn diagrams. You will mostly likely have to fill in a venn diagram in your exam - so make sure that is right before answering the questions themselves or it's fully wrong (but you'll still get attempt marks if it is).
A \ B = A without anything from B
' = Complement (All the elements in the set except the one named with the complement (')
# = Cardinal number (The number of elements in the set)
^ I will get back to you with more