Posted by Curt on Saturday, October 6, 2012 at 2:13pm.
216 / 2 = ?
Ms. Sue is correct. Since $11 is halfway between $10 and $12, there is an equal amount of each coffee.
algebraically, consider the value of each component, and the total. If there are x kg of Brazilian coffee, then there are 216-x kg of Turkish.
10x + 12(216-x) = 11*216
x = 108
This method will also work if the price ratio were different.
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