Free Practice Question
PS · Problem Solving
705-805
Combinations
There are 5 locks and 5 keys and each of the 5 keys matches each of the 5 locks. What is the minimum and the maximum trial numbers of attempts needed to confirm that each of the 5 keys matches each of the 5 locks?
Answer Choices
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5,15
B
4,15
C
5,10
D
4,10
E
5,20
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Explanation
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Difficulty
705-805
Type
PS
Category