160 equates to just about 20 wrong questions (out of the 75 non-experimental questions), lets say you get -7, -7, -6, and -6 across the 4 sections, with one of the -6s being the experimental, this would equate to getting about 25 out of 100 questions wrong, so about 75% accuracy. On a 10 Q drill this will be somewhere in the range of 7 or 8 correct, and on a 15 Q drill about 12 correct.
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Or 15. I just do not want to spend too much time drilling one topic.
160 equates to just about 20 wrong questions (out of the 75 non-experimental questions), lets say you get -7, -7, -6, and -6 across the 4 sections, with one of the -6s being the experimental, this would equate to getting about 25 out of 100 questions wrong, so about 75% accuracy. On a 10 Q drill this will be somewhere in the range of 7 or 8 correct, and on a 15 Q drill about 12 correct.