The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 66 kg. What might be the weight of the new person?  Choices:  A) 56 kg  B) 90 kg  C) 86 kg  D) Data inadequate  E) None of these
C   86 kg   Total weight increased = (8 x 2.5) kg = 20 kg.   Weight of new person = (66 + 20)= 
<gadget id="calculator">(66 + 20)</gadget>
<output>86</output>
86 kg.
<result>C</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 66 kg. What might be the weight of the new person?