Marcella has 24 pairs of shoes. If she loses 9 individual shoes, what is the greatest number of matching pairs she could have left?  Pick:	A) 21	B) 20	C) 19	D) 16	E) 15
Marcella has 24 pairs of shoes and loses 9 shoes.   To minimize the loss of identical pairs of shoes we want Marcella to lose as many identical pairs as possible. This would yield 4 identical pairs and 1 additional shoe (destroying 5 pairs of shoes).   The 24 pairs of shoes minus the 5 'destroyed' pairs yields 19 pairs that still fulfill the requirements.   Answer: 19
<result>C</result>
Marcella has 24 pairs of shoes. If she loses 9 individual shoes, what is the greatest number of matching pairs she could have left?