What is the mean height of the students in a class of 40 students?
(I) The total of the heights of the students in the class is 42.50 meters.
(II) The class has equal number of boys and girls.

if the statement (I) alone is sufficient to answer the question, but (II) does not answer the question.

if the statement (II) alone is sufficient to answer the question but (I) does not answer the question.

if both the statements (I) and (II) are sufficient to answer the question but neither statement alone is sufficient.

if both the statements (I) and (II) together are not sufficient to answer the question and additional data is required.