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Last Updated on May 11, 2023
GMAT OFFICIAL GUIDE PS
Solution:
We are given that Mark and Ann were given n boxes of cookies to sell. Mark sold n – 10 and Ann sold n – 2 boxes of cookies; thus, together they sold n – 10 + n – 2 = 2n – 12 boxes of cookies. Since together they sold fewer than n boxes, we can create the following inequality:
2n – 12 < n n < 12 The only answer that is less than 12 is 11. Answer: A
