Question

In a housing block having 150 occupants, the average weight of the occupants is 50.9 kg. If 10% of the occupants are senior citizens whose average weight is 68 kg and 40% of the occupants are of age less than 18 years whose average weight is 32 kg, then find the average weight of the remaining persons (in kg).

A 63.25
B 62.25
C 62.75
D 62.6
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