A man purchases 2 watches for $ 580. He sells one at 15% profit and the other at a loss of 10%. He neither gains nor loses on the whole. Thus, the cost price of two watches are : Choose one
A) $ 260 and $ 300 B) $210 and $ 350 C) $224 and $336 D) $560 and $560 E) $232 and $ 348
x + y = 580 --- (1)   1.15x + 0.9y = 580 --- (2)   (2) - (1) --&gt; 0.15x - 0.1y = 0   15x = 10y   x/y = 2/3 = (2*116)/(3*116) = 232/348   Answer: $232 and $ 348
<result>E</result>
A man purchases 2 watches for $ 580. He sells one at 15% profit and the other at a loss of 10%. He neither gains nor loses on the whole. Thus, the cost price of two watches are :