
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


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Before going to college, Student A gave their mobile number to classmate B. Later, when B tried to call, they found the last digit of the number was missing due to it being torn off. As a result, B dialed by randomly adding a final digit, avoiding repetition of any digit previously used. What is the probability that B correctly dials A's number in no more than 3 attempts?

Present the answer in LaTex format: \boxed{Your answer}
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