Well, yes. If red:black=10 and black=30, then supposedly red=27, with a total of 57.
Yes, 57 is a reasonable number ;
The total number of collars sold, combining both red and black collars, is 57. This is calculated from the known sales of 30 black collars and the established ratio, which gives us 27 red collars. Therefore, 57 is a reasonable number for the total sold.
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