In the question below, I thought to determine the mean you have to add up all the weights in each category and then divide by 8. I thought you couldn’t just divide the total weight by 8 because each category has a different weight. Where am I confused?

If your operating system is windows 10, you can try to use **shift+windows+s** to capture a screenshot next time.

Because here the question is asking for calculating the arithmetic mean rather than geometric mean.

Thank you. How can you tell which one the question is asking for?

It stated clearly in the question. And in the GRE, we are **always** dealing with arithmetic mean.