First, we have to arrange those numbers in an order .

Now, as the total number of numbers is even the median will be the \frac{12}{2}=6,\frac{12}{2}+1=7 , thus median will be the average of 6th and 7th observation.

Also, if you’re asking PP or PPP questions then add a spoiler tag .

Greg did the whole PP1 walkthrough https://www.gregmat.com/course/powerprep-walkthroughs

Hey Kremlin, I am sorry for not adding that tag before. I did not know we had to add it. Sincere apologies.

How can we assume y value will be at the extreme end, either smallest number or the largest number? Why can’t it be at the middle?

Point is, median will always be average of 6th and 7th value. Choose any value of y and you will land up with 10.

pls where can i find the questions. Thank you

If you have a GRE account you can purchase Powerprep 1 for $0.00

And then give the test

Thank you. but i have already completed the test. i just need the questions for review purposes.

If you go to where you had given the test previously, you will be allowed to review your answers (as well as the questions)