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For questions related to teaching mathematics. For questions in Mathematics Education as a scientific discipline there is also the tag mathematics-education. Note you may also ask your question on http://matheducators.stackexchange.com/.

5 votes

Why do we need random variables?

I believe the answer you may be looking for is that the notion of random variables (that satisfy various properties including linearity of expectation) can be considered as an interface, which in math …
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0 votes

Math talk for all ages

You could try giving a talk in the spirit of Nets, Puzzles, and Postmen, which is a book targeted at the general audience without mathematical background, about graph theory and how it can be applied …