Spring Airlines has scheduled a flight between Shanghai and Kunming on a particular day. The plane has a capacity of 180 seats. The airline knows that there are two categories of customers interested in this trip. Category A: the price is ¥2091. The average demand is 65 passengers on a day, and the standard deviation is 25 passengers. Category B: the price is ¥660. The average demand is 150 passengers on a day, and the standard deviation is 25 passengers. The demand is normally distributed. How much capacity should Southwest airline set aside for Category B?.
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