The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 60 kg. What might be the weight of the new person? Choose the correct choice:  A) 56 kg  B) 80 kg  C) 85 kg  D) Data inadequate  E) None of these
B   80 kg   Total weight increased = (8 x 2.5) kg = 20 kg.   Weight of new person = (60 + 20)= 
<gadget id="calculator">(60 + 20)</gadget>
<output>80</output>
80 kg.
<result>B</result>
The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 60 kg. What might be the weight of the new person?