Kunal takes lsquo a rsquo days to complete a work while Sandeep takes lsquo b rsquo less days than K...........

Quantitative Aptitude (SBI-CL) Data Sufficiency

Kunal takes ‘a’ days to complete a work while Sandeep takes ‘b’ less days than Kunal to complete the same work. Ravi takes ‘b’ more days than Kunal to complete the same work. Rahul takes ‘ab’ days to complete the work while Shyam takes ‘ab2’ days to complete it. Is the combined efficiency of Sandeep and Ravi together less than that of Rahul and Shyam together?

Statement I : b ≥ 1

Statement II : b ≤ 1

The data in statements I alone is sufficient to answer the question, while the data in statement II alone is not sufficient to answer the question.

The data in statements II alone is sufficient to answer the question, while the data in statement I alone is not sufficient to answer the question.

Either Statement I or Statement II alone is sufficient to answer the question.

The data in both the statements I and II is not sufficient to answer the question.

The data in both the statements I and II together is necessary to answer the question.

Explanation:

We cannot say about whether the combined efficiency of Sandeep and Ravi together is less/more than
that of Rahul and Shyam together using the above information.
So, statement II alone is not sufficient to answer the question.
Hence, option A is correct.