Understanding grading options for multi-select questions

There are three possible grading options for multi-select questions:

There are three possible grading options for multi-select questions:

• All or nothing - Users receive full points for the question only if they select all the correct answers and none of the incorrect answers. Users receive zero points for the entire question if they miss any correct answers or select any incorrect answers.
• Right minus wrong - Users receive points equal to the number of right answers they choose minus the number of incorrect answers they choose. Users can receive a minimum of zero on a question; they cannot receive a negative mark.
  To calculate how much each answer is worth, the system takes the total number of points assigned to the question and divides it by the total number of answer choices.
  For example, if a question is worth 10 points total and has 5 answer choices, each choice is worth 2 points (10/5=2). Correct answers are worth +2 points each and incorrect answers are worth -2 points each. If the user selects 3 correct answers and 2 incorrect answers, they would receive 2 points for each correct answer and lose 2 points for each incorrect answer, resulting in a total score of 2 points for the question [3(2)+2(-2)=2].
• Correct answers - Users receive points for each correct answer they select and for each incorrect answer they leave blank. Incorrect answers selected, and correct answers left blank, are not counted.