Assuming that Malaysian education system is like
Singapore,
6 years of primary school, 4 years of secondary school, 2 years of
tertiary education, and 4 years of uni education, total 16 years of
education. Plus 6 to 7 years before primary school, rainee is about
22 or 23. 
That is how I see. You made her 3 or 4 years older.
