Given: The average age of 2 sisters is 16 years. If the age of brothers is also included, the average age of 3 siblings will be 14 years. Formula: Average of n numbers a1, a2 ... an = (a1 + a2 + ... an)/n Calculation: The age of 2 sisters =16×2=32 Let the age of brother be x years As per question, (32+x)/3=14 32+x=42 x = 10 years Hence, Brother’s age is 10 years