We need to use a binomial distribution formula to determine the probability, the formula is:

Where "n" is the total number of questions, in this case, 4 questions
"p" is the probability of getting one question right. Since each question has 4 choices and there is only one right question, the probability "p" is:

"x" is the number of questions we want to get right, in this case, 3. Replacing the values we get:

Solving the operations:


Therefore, the probability is 0.047.