\frac{1}{4}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
When flipping a fair coin, what is the probability that the first two flips are both heads? Express your answer as a common fraction.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{1}{4}
When flipping a fair coin, what is the probability that the first two flips are both heads? Express your answer as a common fraction.
train