A bag has 4 red and 6 blue marbles.  A marble is selected and not replaced, then a second is selected.  What is the probability that both are the same color?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
A bag has 4 red and 6 blue marbles.  A marble is selected and not replaced, then a second is selected.  What is the probability that both are the same color?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{7}{15}
A bag has 4 red and 6 blue marbles.  A marble is selected and not replaced, then a second is selected.  What is the probability that both are the same color?
train