Question

the ages of three sister are 12 yr 15 yr 18 yr find their average age what will be their average age after 3 years​

Answer 1

Answer:

The Averages of age Of childrens now is 15 .after 3 years they become 18

Explanation:

$12 + 15 + 18 \div 3 = 15$

after 3 years

$15 + 18 + 21 \div 3 = 18$