Here is my answer. Hope it makes sense!
Answer:
12
Step-by-step explanation:
Answer:
its a.
Step-by-step explanation:
the empty circle means no line underneath and the line is going to the left.
The number of different codes does this lock provides is 360.
Given that,
- There is the combination lock having push buttons from A to F (6 buttons)
- Out of this, four should be in any order.
- Also, the push button should not be used more than once.
Based on the above information, here we use permutation which is as follows:

= 360
Therefore we can conclude that the number of different codes does this lock provides is 360.
Learn more: brainly.com/question/23283166