What is the percentage of defective items produced in the factory?
(I) The total number of defective items produced in that factory is 450.
(II) The ratio of defective items to non-defective items is 50 : 1250.

if the statement (I) alone is sufficient to answer the question, but (II) does not answer the question.

if the statement (II) alone is sufficient to answer the question but (I) does not answer the question.

if both the statements (I) and (II) are sufficient to answer the question but neither statement alone is sufficient.

if both the statements (I) and (II) together are not sufficient to answer the question and additional data is required.