2013 AMC 12B 第 1 题

Question

在一月的某一天，内布拉斯加州 Lincoln 的最高气温比最低气温高

16

度，最高气温与最低气温的平均值是

3^\circ

。这一天 Lincoln 的最低气温是多少度？

On a particular January day, the high temperature in Lincoln, Nebraska, was

16

degrees higher than the low temperature, and the average of the high and low temperatures was

3^\circ.

In degrees, what was the low temperature in Lincoln that day?

-13

-8

-5

-3

11

最高和最低相差

16

，所以它们各自离平均值

8

度。

The high and low differ by

16,

so each is

8

away from their average

最低气温比平均值

3

低

8

度。

The low temperature is

8

below the average of

3

最高气温比最低气温高

16

，所以最低气温比平均值低

8

。平均值为

3^\circ

，因此最低气温为

3 - 8 = -5^\circ

。所以正确答案是 C。

The high exceeds the low by

16,

so the low is

8

below the average. Since the average is

3^\circ,

the low temperature is

3 - 8 = -5^\circ.

Thus, the correct answer is C.

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