Higher for hire;
Sorry your equation might be wrong, however it still leaves a 25% on each question to get it right by guessing.
Second, after going over the QB more than 2 times, the guessing odds will have strongly reduced, probably to 25% chance of guessing wrong!
Obviously you have not seen what I have seen!
I have seen candidates, plural, never open their books, but still pass their exams alone on using the QB's!
I did not say they would pass the whole exam by luck, but with QB and a bit of luck, not really that complicated!
Also a multiple choice test, can give you the answer, to help you recall some of what you have read/studied, but might not have remembered, unless you saw it written in front of you!
But don't worry, when you go for CPT upgrade, there is no longer multiple choice exams to worry about! Still I have to say, from what I have seen, it does not give enough to give me comfort in that the student really has understood the topic, it is to easy, simple as that!