From 883050f1d2c2d649d809c31d7dde58ae6415ded1 Mon Sep 17 00:00:00 2001 From: eggy Date: Thu, 25 Mar 2021 09:56:26 -0400 Subject: [PATCH] add independent event and rule --- docs/mcv4u7.md | 3 +++ 1 file changed, 3 insertions(+) diff --git a/docs/mcv4u7.md b/docs/mcv4u7.md index 9bc8d23..a6b2809 100644 --- a/docs/mcv4u7.md +++ b/docs/mcv4u7.md @@ -189,6 +189,9 @@ $$P(A\cup B)=1$$ The **principle of inclusion and exclusion** forms a general rule for the union between two *independent* events: $$P(A\cup B)=P(A)+P(B)-P(A\cap B)$$ +For independent events: +$$P(A\cap B)=P(A)\times P(B)$$ + ### Conditional probability A vertical bar is used between two events to denote that the event on the left occurs knowing that the right has already occurred.