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? Answers:
A) 5,15
B) 4,15
C) 5,10
D) 4,10
E) 5,20
the actual number of tries that we need to "unlock" all the lockers, and got into the trap 5-15.   of course, if we do not need to unlock the lockers, but just simply to check..   minimum # of attempts is 4.   maximum is 10,   ANS:4,10
<result>D</result>
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?