From Environment Canada: "Our experts on weather and climate have combed through 45 years of weather records, and determined the
probabilities based on the following criteria: -a "white" Christmas is defined as having at least 2 cm of snow on the ground on December 25."
The probability that there will be a white Christmas in Vancouver is 11%.
The probability that there will be a white Christmas in Hamilton is 68%
What type of probability have they used to determine these probabilities?