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Update docs/math/expectation.md
authorTianyiQ <34389237+TianyiQ@users.noreply.github.com>
Sat, 31 Oct 2020 05:28:14 +0000 (13:28 +0800)
committerGitHub <noreply@github.com>
Sat, 31 Oct 2020 05:28:14 +0000 (13:28 +0800)
commitf5b3c2cd2d519c731ceee46f7ae4e1996b992980
tree3b6381b4111b1b48f1c8627a5b01c9410a136922
parent9e5ae6f2ba5636a2a0aa266f09459e8436e82aea
Update docs/math/expectation.md

Co-authored-by: mgt <mgt@oi-wiki.org>
docs/math/expectation.md