hahahut's explanation is clear, why confuse the issue?
Quote:
|
For question one: Let A be the overall population of rats and B be the overall population of dead rats. So the ratio for male rats is 0.3B/0.4A, and the ratio for female rats is 0.7B/0.6A. Now the ratio between male rats and female rats is (0.3B/0.4A)/(0.7B/0.6A), which is 9/14.
|