The average age of 5 members of a family is 25 year if the servant of the family is included the average age increases by 40 percent .what is the age of servant
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average age of 5 members of a family = 25
so sum of age of all members = 25 × 5
= 125
now if we add servent
average age increases by 40 %
old average = 25
so new average = 25 + 40 % of 25
= 25 + 10
= 35
so now if average of 6 members = 35
then sum of their ages = 35 × 6
= 210
so , servents age = sum of ages of 6 members -sum of ages of five members
= 210 - 125
= 85 years
so sum of age of all members = 25 × 5
= 125
now if we add servent
average age increases by 40 %
old average = 25
so new average = 25 + 40 % of 25
= 25 + 10
= 35
so now if average of 6 members = 35
then sum of their ages = 35 × 6
= 210
so , servents age = sum of ages of 6 members -sum of ages of five members
= 210 - 125
= 85 years
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