by jen Thu Jul 19, 2012 3:43 pm
Hi, this is Jen (instructor).
Good question! There is no guessing penalty. So, do not leave any regular multiple choice questions blank (since it's so easy to just click a random answer even if you have only a second).
For questions where you type in a response or for "select all that apply" questions, or vocab questions with multiple blanks, your chance of randomly guessing correctly is pretty low (for instance, on a Sentence Equivalence, which has 6 choices, 2 of which are correct, your chance of randomly guessing correctly is 2/6 x 1/5 = 1/15). So, for those question types, answer if you want, but it probably won't affect your score.
Again, however, for any select-one multiple choice, including Quant Comp, definitely guess!
Jen