On a 9 question multiple-choice test, where each question has 5 answers, what would be the probability of getting at least one q

Question

igor_vitrenko [27]

3 years ago

7

On a 9 question multiple-choice test, where each question has 5 answers, what would be the probability of getting at least one q

uestion wrong?

Mathematics

1 answer:

stepan [7] · Answer 1 · 2022-07-13T05:51:57+03:00

stepan [7]3 years ago

4 0

Answer:

P(at least one wrong) = 1- P(all correct) =1-.25^6=1-1/4096=4095/4096. This assumes that the answers are picked at random. This kind of question is always the complement of an extreme binomial outcome.