From 81a3b1a1b066f5a1e01754a4d12c2407593cdbc1 Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Sat, 6 Mar 2021 10:13:24 -0500
Subject: add permutations and combinations

---
 htdocs/js/data.js | 35 ++++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/htdocs/js/data.js b/htdocs/js/data.js
index 5a12764..7b66e46 100644
--- a/htdocs/js/data.js
+++ b/htdocs/js/data.js
@@ -241,7 +241,40 @@ var DATA = {
       "  y &= mx + b",
       "\\end{align*}",
     ],
-  }],
+  }, {
+    name: "Permutations and Combinations",
+    text: [
+      "\\text{Permutations and Combinations} \\\\",
+      "",
+      "\\begin{array}{|c|c|c|c|}",
+      "\\hline",
+      "  \\text{Name} &",
+      "  \\text{Ordering} &",
+      "  \\text{Repetition} &",
+      "  \\text{Formula} \\\\ ",
+      "\\hline",
+      "   \\text{Permutation} &",
+      "   \\text{Yes} &",
+      "   \\text{Yes} &",
+      "   n^k \\\\",
+      "\\hline",
+      "   \\text{Permutation} &",
+      "   \\text{Yes} &",
+      "   \\text{No} &",
+      "   \\frac{n!}{(n - k)!} \\\\",
+      "\\hline",
+      "   \\text{Combination} &",
+      "   \\text{No} &",
+      "   \\text{Yes} &",
+      "   \\frac{(n + k - 1)!}{k!(n - 1)!} = {n + k - 1 \\choose k} \\\\ ",
+      "\\hline",
+      "   \\text{Combination} &",
+      "   \\text{No} &",
+      "   \\text{No} &",
+      "   \\frac{n!}{k!(n - k)!} = {n \\choose k} \\\\ ",
+      "\\hline",
+      "\\end{array}",
+    ]],
 
   themes: [
     "ambiance",
-- 
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