Which says nothing...
The "study" shows almost nothing at all. Merely that women don't know enough math to take courses in university. All of the original questions still stand. Why don't they know math? Stopping at just the reasoning behind the course admission process is lazy. In fact, if women are culturally discriminated against in such a way that they're steered away from learning math - this study is just as bad as anything else. It ends up presenting something that's almost blindingly obvious and then washes its hands of all social responsibility.