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 all answers correct 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 average score for guessing on a multiple choice test?
You would have a 20% chance of guessing correctly, whether you answer a, b, c, d, or e. As such, on average, always guessing "c" would get you a 20 (on a scale of 100 points). Also on average, randomly picking one of the 5 choices, would get you a 20 average.
How reliable are multiplechoice questions?
Multiple choice test items are less susceptible to guessing than true/false questions, making them a more reliable means of assessment. The reliability is enhanced when the number of MC items focused on a single learning objective is increased.
Is C usually the correct answer?
What are the odds of passing a test by guessing?
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.
How do you get a good grade by guessing?
Guessing Strategies
Use the wording of the question or answer as a clue to eliminate possibilities. Choose the most precise answer. Avoid answers that seem out of context. Choose a numerical answer from the middle of the range, not from either extreme.
Frequently Asked Questions
What is the probability of getting the right answer from 4 different choices?
Correct? The immediate thought is  there are four options, so if I pick one at random then each has a one in four chance of being chosen. That means the answer is 1/4, or 25%.
How many ways can a 5 question quiz with 4 multiple choice questions be answered?
1024 ways
There are 1024 ways to answer these questions. Only one of these ways will give us the correct answer for all of the five problems.
How do you get 100 on every multiple choice test?
 Five Tips to Ace Your Multiple Choice Exams.
 Read the questions carefully. Make sure you understand what the question is asking.
 Answer the question without looking at the options.
 Eliminate the incorrect options.
 Answer all the questions.
 Manage your time.
 More resources for multiple choice questions.
What is the most likely answer on a multiple choice test?
Most people (and tutors) tell students that, if they have no idea on a question, to just guess answer choice “C” — the middle answer on most multiple choice tests.
What is the probability of answering a multiple choice test?
In a test an examinee either guesses or copies or knows the answer to a multiple choice question with 4 choices. The probability that he makes a guess is 1/3 & the probability that he copies the answer is 1/6. The probability that his answer is correct given that he copied it, is 1/8.
FAQ
 Is it possible to get a 0 on a multiple choice test?
 In a multiplechoice answer (even in a hint), students can lose either a fixed percentage or a fraction of their possible grade for each wrong answer. If they submit all possible wrong answers, they get a 0. "No penalty for opening hints" is not the same as "no penalty for a wrong answer on hints."
 What is the probability of correctly guessing?
 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.
 Why is C the most common answer?
 I'm sure you've heard this at some point “if you don't know the answer, always guess C. because it's the most common correct option”. That's just a myth, and generally there are no most common answers on multiple choice tests.
 How do you get an A on a multiple choice test?
 Use these five tips to help you ace the multiple choice questions on your tests and exams.
 Read the questions carefully. Make sure you understand what the question is asking.
 Answer the question without looking at the options.
 Eliminate the incorrect options.
 Answer all the questions.
 Manage your time.
What are your odds of guessing a multiple choice question correctly
What are the chances of passing a multiple choice test?  The multiplechoice questions on this test have four choices, so your odds are 1 out of 4 that you can pick correctly. To put it another way, you have a 25 percent chance of guessing correctly. These aren't great odds, so you have to find a way to increase them. 
Is C the most common answer on tests?  I'm sure you've heard this at some point “if you don't know the answer, always guess C. because it's the most common correct option”. That's just a myth, and generally there are no most common answers on multiple choice tests. 
How to get 100 on a multiple choice test?  How to ace multiple choice tests

What is the probability of guessing correctly?  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. 
 Is it okay to guess on a test?
 If you've ever taken a standardized test—like the SAT, ACT, or PSAT—you've probably encountered some questions that you didn't know how to answer. When this happens, you should always guess, even if you have no idea which choice is correct.
 How many questions can you get right by guessing?
 Depends on the number of choices. Say you have 4 choices for each of 40 questions. Then , by pure random guessing, you have a probability of 1/4 of getting any question right. This is then a binomial, with p=1/4, 1p =3/4, so that the mean is np=40(1/4)=10.
 How do you guess and pass a test?
 Guessing Strategies Use the wording of the question or answer as a clue to eliminate possibilities. Choose the most precise answer. Avoid answers that seem out of context. Choose a numerical answer from the middle of the range, not from either extreme.
 Are you likely to be able to pass by guessing on every question?
 If you randomly guess all of the answers, your chances of getting at least one question correct are about 26%. If the required passing score is 50%, then your chances of passing the exam by guessing alone are about 10%.