Question

The averageve age of three brother is 15 year if the age of brother is 15 year and 12 year ,find the age of the third brother​

Answer 1

Answer:18

Step-by-step explanation: take x as the unknown age. Then (15+12+x)÷3=15 [average] from which you'll get x=18

Answer 2

Answer:

18

Step-by-step explanation:

the age average of three brothers =15

let the third brother age be x

so to calculate average we need to add everything and divide it by total no.s

so

15+12+x(whole divided by 3)=15

27+x=15*3

27+x=45

x=45-27

x=18