Question

The average age of three sisters is 21 years. If the age of two sisters is 24 years

and 22 years, find the age of the third sister.​

Answer 1

Answer:

Average age = sum of ages of 3 sisters/number of sisters

Average age = (46 + x)/3

21 = (46 + x)/3

21 x 3 = 46 + x

63 - 46 = x

17 = x = 3rd sister's age

Hope this helps you...