Question

In how many days can ‘Q’ alone complete the work?
I. P, Q and R together can complete the work in 9`(3)/(13)`   days.
II. P and Q together can complete the work in 10 days, Q and R together the work together in 20 days, and P and R together can complete the work in 15 days.

Each of the questions below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and give answer – 
A If the data in statement I alone is sufficient to answer the question, while the data in statement II alone is not sufficient to answer the question.
B If the data in statement II alone is sufficient to answer the question, while the data in statement I alone is not sufficient to answer the question.
C If the data either in statement I alone or in statement II alone is sufficient to answer the question.
D If the data in both statements I and II together are necessary to answer the question.
E If the data even in both statements I and II together are not sufficient to answer the question.
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