A multiple choice test consists of eight questions, each of which has five choices. Each question has exactly one correct answer

Question

Vsevolod [243]

3 years ago

11

A multiple choice test consists of eight questions, each of which has five choices. Each question has exactly one correct answer

.
William guesses randomly at each answer. What is the probability that he gets six or fewer questions correct?

Mathematics

2 answers:

Nesterboy [21] · Answer 1 · 2022-05-18T13:28:29+03:00

Nesterboy [21]3 years ago

7 0

I dont under standyou

Fed [463] · Answer 2 · 2022-05-18T15:48:35+03:00

Fed [463]3 years ago

5 0

William has clearly not studied.

There are five choices for eight questions. The probability of getting a question right is 1 in 5 or 20%. The probability of getting all of them right is 0.00000256. The probability of him 6 or fewer questions correct is over 99% likely.