
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
If systematic sampling is used to select 21 people for a survey from a group of 420, and each person is randomly assigned a number from 1 to 420, then the number of people among the selected 21 whose number falls in the interval [241, 360] is ____.

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