# PBS Teachers™

 Chances Are - Part 2 - It's a Mystery to Me Probability Download PDF Lesson | Get Acrobat A Printable version of this lesson is available in PDF format. This requires a free plug-in, Adobe Acrobat Reader. You can find out if you need it by clicking on the PDF link. Objective - Part 2 Students will be able to name all of the possible outcomes of a given event and predict the likelihood of an event occurring based on a data set. Overview of the Lesson Students extend their understanding of basic probability concepts as they learn to name all of the possible outcomes of an event as well as ways to express the likelihood of such an event occurring. Students use large number cubes and oversized playing cards as they explore ways to express probability. These ways include ratios such as one out of four or 1/4. Computer software that simulates the rolling of a number cube 1,000 times in a few seconds is used to stimulate student inquiry. Students are then actively engaged in a probability experiment where they must collect, organize, display, and interpret data concerning thirty spins on a "mystery spinner." At the conclusion of the lesson, students are given opportunities to share their data displays with others and encourage classmates to predict what their "mystery spinner" might look like based on the data collected. Students then compare their predictions with the actual spinner. © 1995 - 2013 Public Broadcasting Service (PBS).