
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
A certain interest group consists of 10 people, including 5 members. If 4 people are selected from these 10 people to participate in an activity, let $X$ represent the number of members among the 4 people. Find $P\left(X=3\right)=$______; $EX=\_\_\_\_\_\_$.

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