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# [///], 1 byte

 A

[Try it online!][TIO-kctg3w36]

[///]: https://esolangs.org/wiki////
[TIO-kctg3w36]: https://tio.run/##K85JLM5ILf7/3/H/fwA "/// – Try It Online"

As it’s 1 byte, simply outputting the source code gives the average. `///` just outputs the source code unchanged if it doesn’t contain any `/` characters, so almost any ASCII character works in place of `A`

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