The question consists of four statements numbered I, II, III, and IV given below it. You have to decide that the data provided in which of the following statement alone is not sufficient to answer the question.

A box contains 'x + 4' red, 'x' green, 'x - 3' blue balls. Find the total number of balls in the box.

Statement I : The probability of drawing a blue ball is 0.2.

Statement II : The probability of getting a red ball is 12/25.

Statement III : The probability of getting a green ball is 8/25.

Statement IV : The probability of drawing a red ball and a blue ball one after another and without replacement is 0.2.