A collection of three worksheets on the following topics: * Measures of Center (Mean, Median, Mode) * Measures of Location and Variability * Probability (Sample Space and Counting Principle) In the first worksheet, the students are required to find the mean, the median and the mode for given data sets which are presented as a list of numbers or using a bar chart. Word problems involving these measures are also included. In the second worksheet, the students are required to find the mean, the me