What is the probability of drawing a white ball at random from a bag?
I. The bag has a total of 15 balls.
II. The bag contains white balls and black balls.

A

If the statement I alone is sufficient to answer the question.

B

If the statement II alone is sufficient to answer the question.

C

If both the statement I and II are sufficient to answer the question but neither statement alone is sufficient.

D

If both the statement I and II together are not sufficient to answer the question and additional data is required.