GRE Math Riddle: Doubling the Average Rate

You can attend the first session of any of our online or in-person GRE courses absolutely free. Crazy, right? Check out our upcoming courses here.
Here’s a GRE math riddle:

You can attend the first session of any of our online or in-person GRE courses absolutely free. Crazy, right? Check out our upcoming courses here.
Here’s a GRE math riddle: