Directions: The following problem has a question and two statements labelled (1) and (2). You have to decide whether the statements are sufficient to answer the question. Mark your answer as

How many books are on the bookshelf? (1) The average weight of each book is 1.2 kg. (2) The book and the bookshelf together weigh 34 kg.

if you can get the answer from (1) alone, but not from (2) alone

if you can get the answer from (2) alone, but not from (1) alone

if you can get the answer from (1) and (2) together, although neither statement by itself suffices

if (1) alone suffices and (2) alone suffices

if you cannot get the answer from (1) and (2) together, and need even more data