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One week a cerain truck rental lot had a total of 20 trucks, all of wich were on the lot Monday morning.
If 50 percent of the trucks that were returned to the lot on or before Saturday morning of that week, and if there were at least 12 trucks on the lot that Saturday morning, what is the greatest number of different trucks that could have been rented out during the week?
(A) 18
(B) 16
(C) 8
(D) 4
答えは(B)だそうですが、解説を読んでも意味が全然分かりません。どうかお分かりの方、教えてください。
よろしくお願いします。
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