How many books are on the table ?
I. The total weight of the books on the table is 130kg.
II. The weight of the table is also 130 kg.

if the data either in statement I or in statement II alone are sufficient to answer the question.

if the data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.

if the data even in both statements I and II together are not sufficient to answer the question.

if the data in both statements I and II together are necessary to answer the question.