Hello,

It is quite difficult to predict the exact score such that you will be score a rank under 15000 because KCET marks vs rack trend changes ever year depending on top score in the exam, total number of candidates appeared, ties in score etc. As per experts analysis if you score in between 63-65  marks in KCET your rank is expected to be in between 10001 - 20000. As you are aiming to secure a rank under 15000 you should aim to score above 65 marks in KCET because the marks vs rank trend vary this year. For your reference you may check KCET Marks vs rank trend (tentative) by clicking on the link below

https://engineering.careers360.com/articles/kcet-marks-vs-rank