Ruby Data Types : <p>Which two of these three expressions are equal? Why?</p>

<pre class="lang-rb prettyprint-override"><code>{ "city" =&gt; "Miami", "state" =&gt; "Florida" }
{ :city =&gt; "Miami", :state =&gt; "Florida" }
{ city: "Miami", state: "Florida" }
</code></pre>
