Probabilities... statistics. I need help!

Question

A class consists of 10 men and 20 women. An examination is given and the students are ranked according to their performance. Assume that no two students obtain the same score. If the men were ranked just among themselves and the women among themselves, how many different rankings are possible?

Answer 1

If I understand your question (doubtful), 2 x 10! or 2x10x9x8....2.

Answer 2

Not sure I understand the question, but I am guessing the answer they want is 20.  Because In this scenario no one would be ranked 21st through 30th