Progressive Data questions from Grade 6 to 8. Topics ProbabilityAverage and rangeGraphs and chartsResource Content Revision Book 12 pages Answer key 3 pages Content details Probability (mutually exclusive events, equally likely outcomes, combined events, sample space diagram, tree diagram)Average and range (ungrouped and grouped data, frequency polygon, histogram)Graphs and charts (pie charts, stem-and-leaf diagram, scattered graph, Venn diagram)