Venn diagrams are used to sort sets of data. The probability of an event not happening uses the complement of the region on the Venn diagram. Count the number of elements in each region. Redraw the ...

British mathematician John Venn (pictured above, click to enlarge) was born on August 4, 1834, so tomorrow will mark the 187th anniversary of his birth in Hull, England. John Venn is most known for ...