Question

5. The average age of three brothers is 15 years. If the age of two brothers is
15 years and 12 years, find the age of the third brother.
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Answer 1

Step-by-step explanation:

let the age of third brother be x

(15+12+x)/3=15

15+12+x=15*3

27+x=45

x=45-27

x=18

age of third brother is 18year

Answer 2

Answer:

age of third brother is 18years.

Step-by-step explanation:

let the age of 3rd brother be 'x'

(15 +12+x) ÷3=15

x= (15×3) - 27

x= 45 - 27

x = 18