单选题 If two liters of a solution that is 15 percent salt will be added to 5 liters of a solution that is 8 percent salt, what percent salt will the resulting solution contain?
【正确答案】 A
【答案解析】两种solution混合后，共含有盐：2×15％+5×8％=0.7，而混合后一共有solution 2+5=7 liters，所以混合后最终Solution中含有盐分为=0.7/7=10％，A为正确答案。