Final answer:
The total number of questions in the ATI is 180. The reference numbers provided are unrelated to the question count and are likely for study guides or textbook sections.
Step-by-step explanation:
The total number of questions in the ATI is explicitly mentioned in the first part of the student's question. The ATI has 180 questions, and there is a 3 hour allowance for completing the test. The provided reference numbers (391, 207, and 353) do not pertain to the question count in this context and are likely related to different sections or pages within a study guide or textbook. Therefore, the correct answer to the question 'What is the total number of questions in ATI?' is option 1) 180.