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

Hola!!

let's solve your question

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

Average age=(46+x)/3

21×3=46+x

63-46=x

x=17

So,The age of 3rd sister 1s 17

Hope this will help you.