Question

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

Answer 1

Answer: 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 = 25 into x = 25x

the sum of age of these family members now and after 5 years elapsed = 25 x (these added 5 years * no of family members)  = 25x + 5x = 30x

Sum of ages = 30x

no. family members = x

Therefore, current, average age  =  sum of ages/ no. of members = 30x / x = 30

Answer 2

Answer:

this simple answer is 30 year

Step-by-step explanation:

25 + 5= 30 year