
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
Given four differently colored ping-pong balls that are randomly placed into four separate boxes numbered $1$, $2$, $3$, and $4$ (each box is large enough to hold all four balls). Let $\xi$ represent the number of empty boxes. Calculate the expected value $E(\xi)=$\_\_\_\_\_\_\_.

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