A security system has a lock with 5 rings.Each of these rings is marked with 5 different letters.
Calculate the total number of failed attempts made to open the lock
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Answered by
2
ANSWER = 1023
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5
Answer:
1023 is correct answer....
Step-by-step explanation:
Number of options on 1st ring is 4
Number of options on 2nd ring is 4
Number of options on 3rd ring is 4
Number of options on 4th ring is 4
Number of options on 5th ring is 4
∴ Total number of attempts possible
=4×4×4×4×4=1024
We can open the lock only in one of the total attempts
∴ Number of all possible unsuccessful attempts to open the lock is =1024−1=1023
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