Hi Rakhi,
Scholarships are given by law school's after considering numerous factors such as LSAT score, undergraduate grades and extra-curriculars that demonstrate leadership abilities. Coming to your question of 100% scholarship, a score of 170 and higher out of 180 can help you land a partial or a full scholarship in a top 20 school given that other factors are good too.
For more information on LSAT exam you can refer the following article:
https://studyabroad.careers360.com/articles/lsat
Hope it helps!
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