Can you pass this 1990s quiz?
Who was the best-selling musical artist in the 90s?
Jennifer Lopez
Madonna
Britney Spears
Mariah Carey
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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?