The general expression of joint probability density of total cost is given.

给出了总费用联合概率密度的一般表达式。

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Most of the joint-stock Banks deposits of individuals less than 10% of total deposits, deposits stability is poor, the cost always remain at a high level.

大多数股份制银行的个人存款不足存款总量的10%，存款的稳定性差，成本始终维持在一个较高的水平上。

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Similarly, Nissan, along with its joint ventures, plans to have a total of five low cost cars in the country by 2015.

FORBES: GM Races To Sell Cheap Cars To China's Rising Middle Class