Unlike partial answers with deduction, partial answers without deduction do not cancel out correct answers when incorrect answers have been selected on the same question. If an incorrect answer is not selected, it’s considered a correct choice, therefore receives the same percentage rate as a correct answer. If an incorrect answer is selected, it’s percentage rate will be equal to zero.
To better understand how this works, divide 100 to the number of choices (answers) you have for a question. The result (as in X) represents the percentage rate of each choice. If an incorrect answer is selected, the percentage rate is zero, but when not selected, it’s X. For correct answers it’s the other way around: selected is X, but when not select, it’s zero. Upon submission, the quiz will sum up the percentage rate of each choice of a question, giving a total which shows how well the recipient did on the respective question.