Nayland College Mathematics  'More than just a school'  

Two Way tables & Venn Diagrams (Introduction) Introduction to Venn Diagrams and understanding concepts of: Union, Intersection, Complement, Mutually exclusive, Independence Activity Venn diagram mix & Maich John Venn Venn’s most important work was in logic and probability. In his book Symbolic logic he What Does Independence Look Like on a Venn Diagram? Nice clear videos by Brandon Foltz.

Two way tables Two way Table nceax.co.nz quiz 1  quiz 2  quiz 3 Statistics Glossary link to www.stats.gla.ac.uk Maths is fun venn diagrams (link) Read p66, 94  97 Activity (the basics of Venn diagrams) 
Probability from recorded results 

A witch's potion can have a range of contents and either it is successful or it explodes 
The probability of:1) a potion containing a frog 2) an exploding worm potion 3) a potion exploding 4) an exploding potion containing a slug 5) a worm potion being a success Mouseover key words 
Potion information
table 