Students often are given questions that require them to find basic probabilities for a 2×2 matrix such as this problem:

You can work this problem using StatCrunch using the Stat>Tables>Contingency path, but some students get confused by the cluttered output. I have developed an Excel worksheet that makes this much easier for a 2×2 table.

You may download a copy of the calculator workbook here: Basic Probabilities Calculator

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