r/PeterExplainsTheJoke 12d ago

Meme needing explanation What movie reference am I missing

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u/Available-Bee-5385 12d ago

Getting 0 on a multiple choice is a statistical accomplishment greater than getting 100

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u/TwillAffirmer 12d ago edited 12d ago

No, if you're guessing randomly, getting 100 is less likely than getting 0. Because for each question there's a 3/4 chance to miss it and a 1/4 chance to get the right answer.

If you aren't guessing randomly, but in fact know every question, getting 100 is no harder or easier than getting 0. Because you can get 0 by choosing to answer each question different from the answer you know is correct.

If you only know most of the questions, getting 100 is harder than getting 0, because for every question that you don't know you have a 1/4 chance of getting it right if you're aiming for 100, but a 3/4 chance of getting what you want if you're aiming for 0.

Still, with this many questions, to get exactly 0 it's almost certain the student knew most of the answers and was deliberately choosing the wrong ones.

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u/chicken2007 12d ago

Getting 0 and 100 are only equivalent of it's true/false only test.

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u/TheBSQ 12d ago

The picture is not of a true / false test, so in the context of this post, it’s a bit of a tangent.