From 1f1c0c90e3c58fed28b07978e86a194ae98fa466 Mon Sep 17 00:00:00 2001
From: Hoang Dinh Quang <quanghdse03459@fpt.edu.vn>
Date: Fri, 4 Aug 2017 10:09:29 +0200
Subject: [PATCH] Update Probability.md

---
 Probability.md | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/Probability.md b/Probability.md
index b2a35fc..4c7e544 100644
--- a/Probability.md
+++ b/Probability.md
@@ -1,3 +1,17 @@
 * Multiominal Coefficients:
 
-    ![](https://latex.codecogs.com/gif.latex?\binom{n}{n_{1},&space;n_{2},&space;..,&space;n_{m}})
+    ![](https://latex.codecogs.com/gif.latex?\binom{n}{n_{1},&space;n_{2},&space;..,&space;n_{m}}&space;=\frac{n!}{n_{1}!n_{2}!...n_{m}!})
+
+    Phân phối n người khác nhau về m nhóm khác nhau với số lượng tương ứng: n1,n2,...,nm
+
+    Ví du: abcd => 2 nhóm mỗi nhóm 2 người
+    - (ab)(cd)
+    - (ac)(bd)
+    - (ad)(bc)
+    - (bc)(ad)
+    - (bd)(ac)
+    - (cd)(ab)
+
+    Kết quả: 
+    
+    ![](https://latex.codecogs.com/gif.latex?\frac{4!}{2!2!}=6)