Question

For any three numbers $a,b,c$ in an arithmetic progression ______

• A. $b$ is the arithmetic mean of a and $c$.
• B. $a$ is the arithmetic mean of $b$ and $c$.
• C. $c$ is the arithmetic mean of $a$ and $b$.
• D. Any of the above

Answer 1

The correct option is A $b$ is the arithmetic mean of a and $c$.

For any three numbers $a,b,c$ in an arithmetic progression b is the arithmetic mean of $a$ and $c$. Thus the correct answer is $a$.