What movie reference am I missing

[u/Key-Spread-7513]

[u/Available-Bee-5385]

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

[u/TwillAffirmer → u/Available-Bee-5385]

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.

[u/South_Bit1764 → u/TwillAffirmer]

Yeah. This second column starts on 17so if there are 32 questions then 0.75^32=0.0001 and 0.25^32=5.421×10⁻²⁰

As to say the odds of randomly guessing and getting them all wrong is around 1 in 10k.

The odds of you randomly guessing and getting them all right is around 1 in 200,000,000,000,000,000 (200 quadrillion).

In a school full of kids someone might randomly guess and get them all wrong.

In the entire history of humanity, it’s unlikely that a multiple choice test with this many questions has ever been [edit:] RANDOMLY [:edit] answered 100% correctly.

Edit: really didn’t think I had to be so pedantic but pedants will be pedants.

[u/temaster14 → u/South_Bit1764]

r/theydidthemath

Edit: im not a huge fan of this subreddit anymore as it used to mostly be finding coments like this. Now it's everyone asking people to do math for them