Direction: The following questions have two statements. Study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
How many students are there in the class?
Statement I: If two students weighing 54 kg and 42 kg leave the class and are replaced by two students weighing 58 kg and 62 kg .The average weight of the class increases by 0.8 kg.
Statement II: The average weight of the class is 54 kg.1
Statement I alone is sufficient to answer the question.
2
Statement II alone is sufficient to answer the question.
3
Either statement I or statement II alone is sufficient to answer the question.
4
Statements I and II taken together are sufficient to answer the question.
5
Statement I and II together are not sufficient to answer the question.