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Explanation:

Given total number of passengers in the bus = 45

First average weight of 45 passengers = 52 kgs

Average weight of 5 passengers who leave bus = 48

Average weight of 5 passengers who joined the bus = 54

Therefore, the net average weight of the bus is given by

= 45 x 52 − (5 x 48) + (5 x 54)/45

= 2370/45

= 158/3= 52.66 kgs.