The previous answer is still accurate for an answer to the original question, based on your link. The policy is not retro-active so she would (should) have inherited her father's Indian race (according to the archaic Singaporian policy). Even those born after this 2011 policy change are still only allowed one race - the double barrel option doesn't change that. From your source "For relevant Government policies, such as the initial assignment to a mother-tongue language class in schools and the HDB’s Ethnic Integration Policy, the first component of a double-barrelled race will be used."