What determines the winner in Scrabble?

Scrabble has a scoring system, where tiles like Q and Z has 10 pts, X and J has 8, K has 5, and other tiles less. This, in combination with premium squares( double Word, triple letter etc.), a score can be derived in accordance with the Words and tiles used. A 'bingo' will score an additional 50 pts. The person with the highest score wins.