Kill Bill is an American two-part martial arts film series, and the fourth film written and directed by Quentin Tarantino.
Solve this puzzle
Erin reads an average of 20 books per year. She read 23, 17, 20, and 19 books in four different years. How many books did Erin read in the 5th year to make it an average of exactly 20.0 per year?