the average age of three brother is 15 years. If the age of two brothers is 15years and 12 years, find the age of the third brother.
Answers
Answer:
Age of the third brother is 18 years.
Step-by-step explanation:
Given:
Average age of three brothers = 15 years.
And, Age of two brothers is 25 years and 12 years.
To Find:
Age of the third brother.
Solution:
Sum of the age of the three brothers = Average age of the three brother x 3
⇒Sum of the age of the three brothers = 15 x 3 years
= 45 years.
∴Sum of the age of the two brothers = (15 + 12) years
= 27 years.
∴ Age of the third brother = (Sum of the age of three brothers - Sum of the age of the two brothers)
⇒Age of the third brother = (45 - 27) years.
= 18 years.
Hence, Age of the third brother = 18 years.
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