Mohaimain has 25 pairs of different shoes. If he loses 9 individual shoes, what is the greatest number of matching pairs he could have left ?

A. 21

B. 20

C. 19

D. 16

E. None of these

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সঠিক উত্তরঃ B. 20

Explanation:

Greatest number of paired shoes means greatest number of lost pairs 9 shoes have 4 pairs and 1 extra shoes of a pair. So, a total of 5 pairs she loses leftover pair-20

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Mohaimain has 25 pairs of different shoes. If he loses 9 individual shoes, what is the greatest number of matching pairs he could have left ?