GMAT score 50 when I had 7 out of 31 incorrect. Can this be right?

Don't get the wrong idea. "Missing 7 questions" is not as important as "Which 7 questions were missed". Questions come with different difficulties. Plus, wrong answers at different stages has different impact in your score. For further understanding you can read this excellent analysis by Bunuel "GMAT Prep Software Analysis and What If Scenarios"

Hi BoXia,

I would not say this is particularly normal; however, as has been said, the difficulty of the questions you get wrong has a significant influence on your score. So, it's quite possible that you got many "hard" questions wrong. In any case, great work with Q50! Once you take another practice exam, let me know.

I once got a 50 on an MBA.com practice test and missed 11 questions.

See the end of this link: https://www.youtube.com/watch?v=zZro7O3 ... H1V4AaABAg

So I did the above exercise twice, but the first time (I'm still mad at myself for this), I forgot to record. So I took the test, missed 11 questions, really struggled, and got the best score I'd ever gotten.

So I did a second recording. The test felt easier and I only missed three questions. But I got the same score.

This doesn't weird me out in the slightest. Many of the 11 that I missed on that first test were very hard. I hardly got punished for missing them. Basically, my punishment was, "Okay, well, we can't give you the perfect score of 51."

But how could I only miss three and get the same score? Well, the three I missed were the same difficulty as whatever difficulty I missed in the first test that got me the 50. Meaning: my ceiling is fixed by the difficulty of the easiest questions I missed. In the 11 and in the 3 I missed, there were questions of relative similarity (probably about three of them!) The 8 extra I missed in test 1 were very hard questions I didn't get that punished for missing.

Yes, it is normal but somewhat rare. It it possible that you attempted the most difficult questions incorrectly.
I read on a site that you can get Q51 with 0-6 mistakes although the average no. of mistakes is 1. So by that logic getting 7 wrong can give you a Q50