
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 bag contains only blue balls and green balls. There are $9$ blue balls. If the probability of drawing a blue ball at random from this bag is $\frac{3}{10}$, then the number of green balls in the bag is?
A) 15
B) 18
C) 21
D) 24
E) 27

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