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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
Nice clear videos by Brandon Foltz.

Class notes pdf 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 