
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 5 balls of the same size in a bag, numbered 1, 2, 3, 4, 5 respectively. If 3 balls are randomly taken out from the bag, what is the probability that the sum of the numbers on the taken-out balls is odd? (Express the result as a simplest fraction.)

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