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At least 100 students at a certain high school study Japanese. If 4 percent of the students who study French also study Japanese, do more students at the school study French than Japanese? 1)16 students at the school study both French and Japanese. 2)10 percent of the students at the school who study Japanese also study French. 我的解体思路 从题目中可以得出: J>100 & F*0.04=FJ, FJ denotes people study both japanese and french. 1). 16 = FJ = 0.04 F => F = 400 Since J > 100 , and F = 400. 不清楚谁多谁少. 2). 0.1J = FJ 0.1J = 0.04 F J = 0.4 F 所以明显J>F 所以答案是B. 请提意见,谢谢. |