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What to Expect: Calculating Expected Values with Probability Distributions in Wolfram|Alpha—Wolfram|Alpha Blog
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gratis - Free alternative to step-by-step-solution feature of Wolfram|Alpha Pro? - Software Recommendations Stack Exchange
Before my TI graphing calculator died I used to use the 'Solver' function that allowed one to define variables then input knowns and solve for the unknown. Where do I find that
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