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4 changes: 2 additions & 2 deletions chapters/part1/combinatorics/index.html
Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,7 @@ <h2 id="perm_distinct">Permutations of Distinct Objects</h2>
<div class="bordered">
<p><b><i>Definition</i></b>: Permutation Rule</p>

<p>A permutation is an ordered arrangement of n distinct objects. Those $n$ objects can
<p>A permutation is an ordered arrangement of $n$ distinct objects. Those $n$ objects can
be permuted in $n \cdot (n – 1) \cdot (n – 2) \cdots 2 \cdot 1 = n!$ ways.</p>
</div>
</p>
Expand Down Expand Up @@ -194,7 +194,7 @@ <h2 id="comb_distinct">Combinations of Distinct Objects</h2>
<div class="bordered">
<p><b><i>Definition</i></b>: Combinations</p>

<p>A combination is an unordered selection of r objects from a set of n objects. If all objects
<p>A combination is an unordered selection of $r$ objects from a set of $n$ objects. If all objects
are distinct, and objects are not "replaced" once selected, then the number of ways of making the selection is:</p>
<p class="mathLeft">
$$
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