The topic of Probability from the GCSE books of the Mathematics Enhancement Program. For information about these resources and an index for the whole collection please visit http://www.mrbartonmaths.com/CIMT.htm Keywords: Probability, Chance, Likelihood, Tree Diagram, Systematic Listing, Conditions, Mutually Exclusive, Independent, Impossible, Certain, Relative Frequency, Outcome, Trials, Experiment, Even, Likely, Unlikely, Estimation, Complementary, Addition Law, Multiplication Law, Theoretical, Experimental, Scale, Listing, Sample Space, Venn Diagram, Replacement.