What is the probability of getting at least 1 correct?

The probability she gets at least one right is 1 minus this, or 0.988470785. In other words, she has an approximately 99\% chance of getting at least one right.

What is the probability of getting at least one question correct just by guessing?

If there were just one question, then the probability of guessing correctly would be 1/3. Since all the answers are independent (the answer to one question has no bearing on the answers to the others), then this is the case with each question, so the chances of guessing all answers correctly is 1/3 × 1/3 × 1/3 = 1/27.

What is the probability of guessing the correct answer to a multiple choice question if there are 4 choices?

There’s 1/4 (0.25) chance to get an answer right for a quiz. To get all the answers right in 4 questions, the prob is 0.25*0.25*0.25*0.25 = 0.004.

What is the probability of guessing on a multiple choice test?

However I can tell you that the probability of passing an exam by guessing on a typical multiple choice exam is 1/4=0.25=25\%, given that there are 4 options for each question. This is because there is only one correct answer out of four answers for each question.

What is the probability of getting at least one 3?

The probability of rolling at least one 3 is 1–25/36=11/36, a bit less than 1/3.

What is the probability of getting 3 questions right?

If you are guessing on these questions, the probability of getting any one of them correct is 1 out of 5, or 1/5. If you guess on each of the three questions, the probability is (1/5)3 = 1/125.

What is the probability that she will get exactly 2 answers correct by guessing?

0.25
What is the probability that she will get at least 2 answers correct by guessing? The probability of answering a question correctly is 0.25. At least 2 answers correct is the same as exactly 2, 3, 4, or 5 questions correct.

How do you guess on a multiple-choice math test?

On a multiple-choice test, the correct answer is right in front of you. If you can’t think of a better way to solve the problem, you could use guess and check: Try each answer until you find the correct one. If there’s no penalty for guessing, make sure to answer every question, even if you have to guess.

What is the probability of getting at least one correct answer?

Thus, the probability of getting at least one correct answer is 1023 1024 ≈ 0.999 There are ten ways the student can get exactly one correct answer (one for each possible question they could have guessed correctly).

How many correct choices are there in each problem?

For each problem, there are five choices , one of which is correct .One student comes totally unprepared and decides to answer by sheer guessing . What is the probability that he will answer at least one problem correctly?? Denote X = the number of correct answers. P ( X ≥ 1) = 1 − P ( X = 0) = 1 − ( 4 5) 3 = .488

How many questions are there on a multiple choice test?

Question 969131: A multiple choice test has 10 questions. Each question has four answer choices. a. What is the probability a student randomly guesses the answers and gets exactly six questions correct?

How many ways can the student have at least one correct answer?

There is some slight ambiguity in the wording of the question, so we will address both interpretations. There is only one way the student can have no correct answers, meaning there are 1024 − 1 = 1023 ways the student can have at least one correct answer.