
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]


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To understand the physical condition of students in grades 10, 11, and 12, a sample of size $1200$ is randomly selected using stratified sampling. The ratio of the number of students in the three grades is $k:5:3$ respectively. It is known that $240$ students from grade 10 were selected. Find the number of students selected from grade 12.

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