Lillys report card

BCMS Mathletes
Topic: Statistics & Data
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Lilly has to get a B for math on her final report card to go to Izzy's sleepover party. So Lilly studies and solves the problem to find out what scores she needs to at least get a 81 in math.

Common Core Standards: 6.SP.2
Problem #: 
202 (2011-2012)
Problem Difficulty Level: 4 [?]