Question

The average age of $A,B$ and $C$ is $43$ years. Which of the following statements are required to find the eldest among them?
Statement:
$I$. Age of $C$ is $65$ years
$II$. Age of $A$ is $25$ years

• A. $I$ is sufficient
• B. Both $I$ and $II$ are required
• C. $I$ and $II$ together are not sufficient
• D. $II$ is sufficient

Answer 1

The correct option is A $I$ is sufficient

Average age of $A,B,C$ is $43$
so, $\frac{A+B+C}{3}=43$
$A+B+C=129$
Statement I age of $C$ is $65$ years
I is sufficient as $129-65=64$ sum of $(B+C)$.