Hello, I am in the middle of a second degree from a less reputable university in Ontario, Canada. In my first degree (computer science), I had over 40 "A"-level grades (Something like 40 out of 50, with some voluntary withdrawals, because I became sick near the end of my degree.) My second degree is in philosophy. and it started out really well, once again, with something like 10 "A"-level grades. In the middle of my degree, I decided to change to philosophy and economics. In economics, I got two "A-'s", a "VW" (voluntary withdrawal), a "C-" and a "D+." I thought that maybe I wasn't a good match for the department, so I decided to switch to philosophy and mathematics instead. The two mathematics courses were a "C-" and a "VW." Because you need at least a "C-" in every course, I had assumed that it was the same case again with me not fitting the department. Therefore, I decided to play it safe and go back to philosophy alone. Even though I got all "A's" when I was originally in the department, my grades were now in the "C"-range! I decided to take it slowly, and took one course last semester, and the grade was "A-." But now, in this semester, there it is again, a "D"-level grade on my first paper! My guess is that what is going on here is highly improbable by chance alone. If, for example, we look at the situation like I had a die that "rolls" "A", "B", "C", or "D" or "F" (analogous to the possible grades), it looks like the dice is highly loaded towards "A" (and even "B" to a lesser extent) for the first 50 or 60 rolls. Then, for the last 10 to 15 rolls, the die starts to lean towards some highly irregular pattern. I don't *know*, but I *suspect* that this is highly improbable, without something changing. The problem is that I don't know what has changed! I'm not doing anything drastically different from before. I was lead to this forum specifically because of the mathematical acumen of the people here. Therefore, I have two questions: 1) What would be (roughly) the probability of the latter grades being accurate? 2) What would be the rough chances of my whole college transcript being accurate? and 3) What could be going on here? As I said, nothing about my study habits or the way I approach things has changed. It is really shocking, because I have gone from someone who could have gotten into graduate school easily, to someone who probably won't get in - or will just barely get in. My confusion is compounded when you consider that my general GRE scores are in the top 80th-90th percentile for every subtest. I just don't get it. For my grades to be that high before by chance, it would have to be an incredible streak of luck. Now, I don't even know what to do.