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  3. Marcella has 25 pairs of shoes. If she loses 9 individual shoes, what is the gre

Marcella has 25 pairs of shoes. If she loses 9 individual shoes, what is the gre

游客2024-01-14  65
问题 Marcella has 25 pairs of shoes. If she loses 9 individual shoes, what is the greatest number of matching pairs she could have left?
选项 A、21
B、20
C、19
D、16
E、15
答案 B
解析 The greatest number of matching pairs remaining will occur when the greatest number of lost shoes are part of matching pairs; if four matching pairs and one other individual shoe were lost, then Marcella would still have 20 matching pairs left.
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