Let, the sum of age of 14 people = x years Average of 14 people =
x
14
According to question
x
14
= 30 years x = 420 years After 4 years; Baby age = 4 years So, the sum of age of 15 people after 4 years = 420 + (15 × 4) = 420 + 60 = 480 years Now, The average of 15 people including baby =
480
15
= 32 years Hence, The average age of family members after 4 years is "32 years".