
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
Johnny now has 10 different colored marbles in his bag. He wants to choose four marbles to play a game, making sure that at least one of the marbles is blue. How many ways can he do this assuming there are 2 blue marbles in the bag?

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