Question $1(1$ point$)$

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An industry consists of six firms with annual sales of $$300,$$$500,$$$400,$$$700,$$$600,$ and $$600.$ What is the industry's $C_4?$

$0\mathrm{.}58$

$0\mathrm{.}62$

$0\mathrm{.}74$

$0\mathrm{.}77$

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