2018-II-43
答案:C
所求的概率
… Read 所求的概率
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= & \dfrac{1}{6} + \df
$\begin{array}{cl}
= & \dfrac{1}{6} + \df
$\begin{array}{|c|c|c|c|c|c|c|c|c|c|} \h
$\begin{array}{cl}
= & 1 – \dfrac{C
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= & 1 – \dfrac{1
$\begin{array}{|c|c|c|c|c|} \hline
&
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= & 5! \times 6! \\
=
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= & \dfrac{C^7_5}{C^
留意該分佈有 $24$ 名工人。則該分佈的下四分位數
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=
所求不同的合唱團數目
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= & C^{20}_4 C^{
所求的概率
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= & \dfrac{5}{15} + \d
由於只有 $532$ 可被 $7$ 整除,所以所求的概率
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=
可組成的密碼數量
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= & 5! \times 2! \\
=
所求的概率
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= & \dfrac{3}{7} \tim