某快餐店出售四种快餐套餐，这四种快餐套餐的价格分别为6元、10元、15元和18元，并且这4种快餐套餐售出的概率分别为0.2、0.45、0.25和0.1。若某天该快餐店售出套餐500，试用中心极限定理计算：该快餐店这天收入至少为5500元的概率。（附标准正态分布Nleft(0，1right)的分布函数style(font-style:italic;font-family:"Times New Roman", Times, serif)(text{Φ)}left(xright)的部分值：style(font-style:italic;font-family:"Times New Roman", Times, serif)(text{Φ)}left(0.39right)=0.6517，style(font-style:italic;font-family:"Times New Roman", Times, serif)(text{Φ)}left(0.48right)=0.6844，style(font-style:italic;font-family:"Times New Roman", Times, serif)(text{Φ)}left(1.48right)=0.9306）

某快餐店出售四种快餐套餐，这四种快餐套餐的价格分别为$6$元、$10$元、15元和$18$元，并且这$4$种快餐套餐售出的概率分别为$0.2$、$0.45$、$0.25$和$0.1$。若某天该快餐店售出套餐$500$，试用中心极限定理计算：该快餐店这天收入至少为$5500$元的概率。（附标准正态分布$Nleft(0，1right)$的分布函数$style{font-style:italic;font-family:"Times New Roman", Times, serif}{text{Φ}}left(xright)$的部分值：$style{font-style:italic;font-family:"Times New Roman", Times, serif}{text{Φ}}left(0.39right)=0.6517$，$style{font-style:italic;font-family:"Times New Roman", Times, serif}{text{Φ}}left(0.48right)=0.6844$，$style{font-style:italic;font-family:"Times New Roman", Times, serif}{text{Φ}}left(1.48right)=0.9306$）