Respuesta :
Answer:
C
Step-by-step explanation:
1 – binomcdf(n: 40, p: 0.2, value: 11) = 0.0875.
The probability that the student guesses at least 12 questions correctly on this portion of the exam is 0.0875.
We have given that,
There are forty multiple-choice questions on this exam, each having answer choices A, B, C, D, or E.
Only one answer choice per question is correct.
Suppose a student randomly guesses their answer choice to each question, and their guesses from question to question are independent.
What is the probability?
The probability can be defined as the ratio of the number of favorable outcomes to the total number of outcomes of an event.
The probability is always less than 1.
1 – binomcdf(n: 40, p: 0.2, value: 11) = 0.0875.
Therefore the probability that the student guesses at least 12 questions correctly on this portion of the exam is 0.0875.
To learn more about the probability visit:
https://brainly.com/question/24756209
#SPJ2
