菜鸟求助求助求助

ssmybaby

From 1973 to 1976, total United States consumption of cigarettes increased 3.4 percent, and total sales of chewing tobacco rose 18 percent. During the same period, total United States population increased 5 percent.

If the statements above are true, which of the following conclusions can be properly drawn?

A. United States manufacturers of tobacco products had higher profits in 1976 than in 1973
B. Per capital consumption of cigarettes in the United States was lower in 1976 than in 1973
C. The proportion of nonsmokers in the United States population dropped slightly between 1973 and 1976
D. United States manufacturers of tobacco products realize a lower profit on cigarettes than on chewing tobacco
E. A large percentage of United States smokers switched from cigarettes to chewing tobacco between 1973 and 1976


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正确答案为B， 谁能给我解释解释，这到底是从哪里看出来的啊啊啊。。。

dengts

Per capital consumption of cigarettes in 1976=(1+0.034)(Per capital consumption of cigarettes in 1973)/(1+0.05)(total population of 1973)

ssmybaby

谢谢 原来是这样 哇塞