There are 20 passengers on a bus, with an average weight of 65 kilograms. When arriving at the station, one passenger got off the bus and another passenger got on the bus, weighing 85 kilograms. At this time, the average weight of passengers on the bus became 67 kilograms. What is the weight of the passengers getting off?

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When the number of passengers is constant, the change of the total number of passengers is "the change of average weight × the number of passengers". According to the meaning of the question, the total number is 20:

Change of average weight: 67-65=2 (kg),

Total change: 2×20=40 (kg),

So the passenger's weight is: 85-40=45 (kg).

A: The passenger who got off the bus weighed 40 kilograms.