
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]


system
In a box, there are 4 products, among which 3 are first-class and 1 is second-class. Two products are drawn from the box one at a time without replacement. Let event $A$ be "the first draw is a first-class product", and event $B$ be "the second draw is a first-class product". Then, $P(B|A)=$ .

($P(B|A)$ is the probability of event $B$ occurring given that event $A$ has occurred.)

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