What was the initial quantity of mixture of juice and water

I.Juice and water were in the ratio 6:1 respectively in the mixture initially.

II.When 7 litre of mixture is taken out and 5 litre of water is added, the ratio between juice and water becomes 8:3 respectively

Directions (next five questions ) : In 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 statement are sufficient to answer the question. Read both the statements and

Give answer :

Directions (next six questions) : Refer to the table and answer the given questions.

Data regarding number of books sold in either hard bounds or paperback editions and also the categories of books sold in Fiction and Non-Fiction categories of books sold in Fiction and Non-Fiction category, by four different shops, in a particular month (January 2014)

[Please note : Total books sold = Number of hardbounds sold + Number of paperbacks sold]