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 answering a question correctly if you make a random guess?

For every question, there are two outcomes: Either you answer correctly or you don’t. If you pick a random answer, the probability of guessing the right answer is one out of four, 1/4, or 0.25. Consequently, the probability of guessing wrong is a lot higher at 3/4 or 0.75.

What is the probability of getting 18 or more questions correct if you are randomly guessing?

A 1 in 36 chance of getting every question correct.

What is the probability that at least 1?

100\%
To calculate the probability of an event occurring at least once, it will be the complement of the event never occurring. This means that the probability of the event never occurring and the probability of the event occurring at least once will equal one, or a 100\% chance.

What is the probability of guessing all the answers correctly?

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 are the odds of getting all the answers right?

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. How do you ace a multiple choice test?

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

What is the probability of getting 4 out of 5 right?

Under complete randomness of the answers and the guesses, the probability of getting any one question right is 25\%. Conversely, the probability of getting an answer wrong is 75\%. The probability of getting any 4 out of 5 right is the sum of the probabilities of the 5 different orders in which one can choose 4 right and 1 wrong: