
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
From a group of $20$ children, a gymnastics student is to be pre-selected. It is known that $4$ of these children have a suitable physique, $5$ have suitable joint structure, and $2$ have both a suitable physique and joint structure. If it is known that the chosen child has a suitable physique, what is the probability that their joint structure is also suitable?

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