Math Simplified
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Math Simplified

Why the “Bell Curve” is so Normal

An intuitive explanation of why summing random variables gives rise to a normal distribution.

Did you ever wonder why bell curves are everywhere? Heights, weights, neurons firing, the apparent brightness of stars… why should they all just happen to follow a similar bell curve distribution?

“It reigns with serenity and…



Simplified is a publication aiming at making mathematics accessible and enjoyable.

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Russell Lim

I teach high school mathematics in Melbourne, Australia. I like thinking about interesting problems and learning new things.