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What is the probability that you will correctly guess at least one question?
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 getting a multiple choice question right?
The multiple-choice 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.
What is the probability at least one?
To find the probability of at least one of something, calculate the probability of none and then subtract that result from 1. That is, P(at least one) = 1 – P(none).
What’s the probability of guessing all 5 answers?
The chance of guessing one answer on its own is 1/3. 45/118 is slightly more than 1/3 which means that guessing all 5 correctly is more probable than guessing only one correctly. This is obviously untrue as guessing each additional answer is increasingly less likely. Thanks for contributing an answer to Mathematics Stack Exchange!
What is the probability of getting the first question right?
Getting the first question right has no affect on getting the second or third question right, thus the trials are independent. Either you get the question right or you get it wrong, so there are only two outcomes. In this case, the success is getting the question right. The probability of getting a question right is one out of four.
What’s the probability of getting 3 choices wrong?
What i know: Each question has 3 selections, and the probability of getting one wrong is 2/3. I thought it would be as simple as the multiplicative rule, but there’s more to it apparently. I think it has to do with a formula as you go along in the questions, but it states that each probability is equal, as a 1/3 chance.
How many correct answers can a student get on a multiple choice test?
The student gets at least 5 correct 3. The student gets 2 correct answers 4. The student gets fewer than 3 correct answers. Date: 08/06/97 at 11:55:26 From: Doctor Anthony Subject: Re: Multiple choice test This is binomial probability with n = 9, p = 1/5, q = 4/5 1.