2005 AMC 12B Problem 4
Below is the professionally curated solution for Problem 4 of the 2005 AMC 12B, from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2005 AMC 12B solutions, or check the answer key.
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Difficulty rating: 1050
4.
At the beginning of the school year, Lisa's goal was to earn an A on at least of her quizzes for the year. She earned an A on of the first quizzes. If she is to achieve her goal, on at most how many of the remaining quizzes can she earn a grade lower than an A?
Solution:
Lisa needs an A on at least quizzes.
She has already, so she needs more of the remaining quizzes.
She can earn a lower grade on at most of them.
Thus, the correct answer is B.
Problem 4 in Other Years
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