Statistics: what fraction are male, female undergrads?

The problem I am working on is:

At a certain university, 3 of every 5 students are women, 1 out of every 6 students is a graduate student, 15% of the male students are graduate students, 20% of the women are in Nursing, 1/3 of the undergraduates are freshmen, and 1/4 of the undergraduates are sophmores.

What fraction of the students are male undergraduates?
What percent of the students are women undergraduates?

Here is a suggested way to start.
Suppose that there are 6000 students at this university.
Then 3600 are female and 2400 are male.
1000 are graduate students and 5000 are undergraduates.
And so forth. You can finish!

algebra

I just had a hard time weeding out the numbers I didn't need. I did come up with an answer thank you very much... : )