Question
The average weight of the first thirteen persons among
fourteen persons is 78 kg. The weight of the 14th person is 39 kg more than the average weight of all the fourteen persons. Find the weight of the 14th person.Solution
let the total average = x given - average of 13 persons= 78 ATQ- 14th person average =x+39 13person 14thperson average-78x+39 totalx max average of 13 people =39/13=3 total average weight =78+3=81 total average of 14 persons = 81+39=120kg
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