I'm one of the exceptions (I do maths, my Mum did maths and my Dad did English).
However, I went to a girls' school, and these subjects were quite under-represented amongst non-Chinese girls. There seemed to be a culture of not wanting to be nerdy, or finding it 'cool' to say maths was difficult.
I wouldn't say vast majority - about 40% of the people on my course are girls. However, there's certainly a large imbalance across the board.