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Where to surprise and win the upgrade probability

the probability of qunar. com winning the upgrade by surprise is set by the organizer, and the specific probability cannot be determined. Upgrade activity is a service form organized by airlines or airports, which is usually carried out by lottery, giving passengers the opportunity to upgrade from economy class to business class or first class. Surprise winning and upgrading is a probabilistic event, and the organizer will set the winning probability according to certain rules and algorithms. These rules and algorithms may include the number of participants, the number of lucky draws, award setting, activity time and other factors. Generally speaking, the probability of upgrade will be affected by the number of seats in airlines or airports, the number of participants and other factors. If the number of seats is small, the probability of upgrading will be reduced accordingly. Similarly, if the number of participants is large, the probability of upgrading will be reduced accordingly. Therefore, the specific upgrade probability needs to be determined according to the specific situation, and it is impossible to determine a specific value.