
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
There are $10$ products, among which $6$ are first-class and $4$ are second-class. If $3$ products are randomly selected, let the random variable $X$ denote the number of first-class products. The mathematical expectation $E(X)$ is \_\_\_\_\_\_.

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