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02_02_05.html
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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="generator" content="pandoc" />
<title>Exercise 2.2.5</title>
<script src="site_libs/jquery-1.11.3/jquery.min.js"></script>
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gtag('js', new Date());
gtag('config', 'UA-134626706-1');
</script>
<style type="text/css">code{white-space: pre;}</style>
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pre:not([class]) {
background-color: white;
}
</style>
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hljs.configure({languages: []});
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</head>
<body>
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max-width: 940px;
margin-left: auto;
margin-right: auto;
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code {
color: inherit;
background-color: rgba(0, 0, 0, 0.04);
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outline: none;
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padding-bottom: 40px;
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border-left-color: #ffffff;
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float: none;
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.dropdown-submenu.pull-left>.dropdown-menu {
left: -100%;
margin-left: 10px;
border-radius: 6px 0 6px 6px;
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</style>
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<div class="container-fluid main-container">
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content: "";
font-family: 'Glyphicons Halflings';
display: inline-block;
padding: 10px;
border-right: 1px solid #ddd;
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content: "";
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font-family: 'Glyphicons Halflings';
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border-radius: 4px;
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float: none;
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}
</style>
<script>
$(document).ready(function () {
window.buildTabsets("TOC");
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$('.tabset-dropdown > .nav-tabs > li').click(function () {
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});
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<h1 class="title toc-ignore">Exercise 2.2.5</h1>
</div>
<blockquote>
<p>How many 5-letter words either start with d or do not have the letter d?</p>
</blockquote>
<p>There are <span class="math inline">\(26^4\)</span> 5-letter words that start with <em>d</em> and <span class="math inline">\(25^5\)</span> words that do not have the letter <em>d</em> for the total of <span class="math inline">\(26^4 + 25^5 = 10222601\)</span></p>
</div>
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$('tr.header').parent('thead').parent('table').addClass('table table-condensed');
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