Hey saima, I'm also planning on applying to various med schools in pakistan and am going through the exact same trouble you are. To answer your question, I'm pretty sure DIMC, as well as many other schools, will accept EITHER your most recent score, or your highest score overall. i haven't heard of very many schools taking the best of all your math or writing scores by adding them up to get your total score. If that were the case, then most people wouldn't be facing problems concerning the SAT I and its competitiveness. If an applicant had taken it more than once, then theyre bound to improve with each test taken. As you said, you've taken it a total of three times, so im guessing you've got a pretty solid score, that is, if you improved with each test.