The average weight of 8 persons increases by 1.5kg when a person weighting 65kg is replaced by a new person. What could be the weight of the new person?  Choices:
A) 67kg B) 77kg C) 87kg D) 97kg E) None of these
Explanation:   Let the average weight of 8 persons be ‘x’   years and the age of the new person be ‘y’ years   so, (8x – 65 + y) / 8 = x+1.5   so, y = 77kgs   65 + 8X1.5 = 77kgs   Answer 77kg
<result>B</result>
The average weight of 8 persons increases by 1.5kg when a person weighting 65kg is replaced by a new person. What could be the weight of the new person?