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	<title>Procura por Gasolina - Histórico de revisões</title>
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		<id>http://www.mysolutions.tecnico.ulisboa.pt//wiki/index.php?title=Procura_por_Gasolina&amp;diff=1043&amp;oldid=prev</id>
		<title>Ist168340 em 11h50min de 24 de fevereiro de 2016</title>
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		<updated>2016-02-24T11:50:55Z</updated>

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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Revisão anterior&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revisão das 11h50min de 24 de fevereiro de 2016&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l8&quot; &gt;Linha 8:&lt;/td&gt;
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&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*LINGUA: pt&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*LINGUA: pt&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*AUTOR: Equipa de Probabilidades e Estatística&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*AUTOR: Equipa de Probabilidades e Estatística&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*MATERIA PRINCIPAL: &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Variáveis Aleatórias Discretas&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*MATERIA PRINCIPAL: &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Distribuições Conjuntas e Complementos&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*DESCRICAO: Conceitos Básicos de Probabilidades&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*DESCRICAO: Conceitos Básicos de Probabilidades&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*DIFICULDADE: *&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*DIFICULDADE: *&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Ist168340</name></author>
	</entry>
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		<id>http://www.mysolutions.tecnico.ulisboa.pt//wiki/index.php?title=Procura_por_Gasolina&amp;diff=1042&amp;oldid=prev</id>
		<title>Ist168340: Criou a página com &quot;&lt;div class=&quot;toccolours mw-collapsible mw-collapsed&quot; style=&quot;width:420px&quot;&gt; '''Metadata''' &lt;div class=&quot;mw-collapsible-content&quot;&gt; *CONTEXTO : Primeiro ciclo universitário *AREA...&quot;</title>
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		<updated>2016-02-24T11:49:07Z</updated>

		<summary type="html">&lt;p&gt;Criou a página com &amp;quot;&amp;lt;div class=&amp;quot;toccolours mw-collapsible mw-collapsed&amp;quot; style=&amp;quot;width:420px&amp;quot;&amp;gt; &amp;#039;&amp;#039;&amp;#039;Metadata&amp;#039;&amp;#039;&amp;#039; &amp;lt;div class=&amp;quot;mw-collapsible-content&amp;quot;&amp;gt; *CONTEXTO : Primeiro ciclo universitário *AREA...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Página nova&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;lt;div class=&amp;quot;toccolours mw-collapsible mw-collapsed&amp;quot; style=&amp;quot;width:420px&amp;quot;&amp;gt;&lt;br /&gt;
'''Metadata'''&lt;br /&gt;
&amp;lt;div class=&amp;quot;mw-collapsible-content&amp;quot;&amp;gt;&lt;br /&gt;
*CONTEXTO : Primeiro ciclo universitário&lt;br /&gt;
*AREA: Matemática&lt;br /&gt;
*DISCIPLINA: Probabilidades e Estatística&lt;br /&gt;
*ANO: 2&lt;br /&gt;
*LINGUA: pt&lt;br /&gt;
*AUTOR: Equipa de Probabilidades e Estatística&lt;br /&gt;
*MATERIA PRINCIPAL: Variáveis Aleatórias Discretas&lt;br /&gt;
*DESCRICAO: Conceitos Básicos de Probabilidades&lt;br /&gt;
*DIFICULDADE: *&lt;br /&gt;
*TEMPO MEDIO DE RESOLUCAO: 15 min&lt;br /&gt;
*TEMPO MAXIMO DE RESOLUCAO: 30 min&lt;br /&gt;
*PALAVRAS CHAVE: conceitos básicos de probabilidades e estatística&lt;br /&gt;
&amp;lt;/div&amp;gt;&lt;br /&gt;
&amp;lt;/div&amp;gt;&lt;br /&gt;
&lt;br /&gt;
A procura semanal de gasolina num determinado posto de gasolina, em dezenas de milhares de litros, é uma variável aleatória \( X\) com \(E[X^2]=25/6\) e função densidade de probabilidade:&lt;br /&gt;
&lt;br /&gt;
\(f_X(x)\)=\begin{cases}&lt;br /&gt;
x-1, &amp;amp; 1\leq x\leq 2\\&lt;br /&gt;
3-x, &amp;amp; 2\leq x \leq 3\\&lt;br /&gt;
0, &amp;amp; \text{caso contrário}&lt;br /&gt;
\end{cases}&lt;br /&gt;
&lt;br /&gt;
# Calcule a probabilidade de a procura de gasolina nesse posto numa semana ultrapassar 16 mil litros.&lt;br /&gt;
# Sendo o posto abastecido no início de cada semana, qual é a quantidade mínima de gasolina com que o posto deve ficar no início da semana de modo a que não falte gasolina nesse posto em pelo menos \(92\%\) das semanas?&lt;br /&gt;
# Determine  a probabilidade (aproximada) de a procura anual (52 semanas) de gasolina no posto ser superior a 110 dezenas de milhares de litros.&lt;/div&gt;</summary>
		<author><name>Ist168340</name></author>
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