Data Sufficiency Practice Test 2

Directions (16−20): In the following questions, each question is followed by two statements (a) and (b) in which certain data is given. In these questions you do not have to actually compute the answer, but rather have to decide whether the data given in the statements are ‘sufficient’ to answer the questions.
Mark (1) if Statement (a) is alone sufficient, but Statement (b) alone is not sufficient to answer the questions.
Mark (2), if Statement (b) alone is sufficient, but Statement (a) alone is not sufficient to answer the question.
Mark (3), if both Statements (a) and (b), together are sufficient, but neither statement alone is sufficient to answer the question.
Mark (4), if each Statement Is sufficient by itself to answer the question asked, and;
Mark (5), if both Statements I and II together are not sufficient to answer the question and additional data specific to the question is needed.