The average weight of 9 persons increases by 1.5 kg. If a person weighing 65 kg is replaced by a new person, what could be the weight of the new person? Choose the correct answer: A) 76 kg B) 77 kg C) 78.5 kg D) Data inadequate E) None of these
total weight increases = 9 × 1.5 = 13.5 kg   so the weight of new person = 65 + 13.5= 
<gadget id="calculator">65 + 13.5</gadget>
<output>78.5</output>
78.5 kg   Answer 78.5 kg
<result>C</result>
The average weight of 9 persons increases by 1.5 kg. If a person weighing 65 kg is replaced by a new person, what could be the weight of the new person?