Each of the questions given below consists of a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
In how many days can 10 women finish a work?
10 men can complete the work in 6 days.
10 men and 10 women together can complete the work in 3
If 10 men work for 3 days and thereafter 10 women replace them, the remaining work in completed in 4 days.