Venn diagrams

• What does U stand for in probability?

  union
• What does $A'$ mean?


  A's complement, or NOT A
• What section has been shaded in this Venn diagram?

  A'UB

  
• What is $\cap$ in probability?


  intersection
• What section do you shade when there is a union?

  all of both
• what section do you shade when there is an intersection?

  shade the overlap between the two areas