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Five years ago mean age of a family was 25 years. What is the present mean age of the family?​

User Mike Yawn
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Answer:Let the number of family members be 'x'

Let the number of family members be 'x'the average age of the family members 5 years ago is 25 years so the sum of age of all family members 5 years ago =25x the sum of age of these family members now and after 5 years elapsed =25x (these added 5 years no of family members) =25x+5x=30x Sum of ages =30x no. family members be x

Let the number of family members be 'x'the average age of the family members 5 years ago is 25 years so the sum of age of all family members 5 years ago =25x the sum of age of these family members now and after 5 years elapsed =25x (these added 5 years no of family members) =25x+5x=30x Sum of ages =30x no. family members be xTherefore, current, average age = sum of ages/no. of members = 30x/x=30

User Irin
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