SAT数学Problem Solving练习题(29)

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摘要:下面是小站SAT频道为大家整理了SAT数学Problem Solving练习题(29),供考生们参考,以下是详细内容。

以下是小站SAT频道为大家整理了SAT数学Problem Solving练习题(29),供考生们参考,以下是详细内容。

Question 29: Out of all of the houses characterized in the table below, what is the percentage of new ranches?

HousesOldNewTotal

Ranch23?30

Colonial?40?

Total23??

(a) 10%

(b) 12%

(c) 15%

(d) 25%

(e) 8%

Answer: The number of new ranches will be 30 - 23 = 7. We need to find the total number of houses.

The number of old colonials will be 23 - 23 = 0, and the total number of colonials will be 40 + 0 = 40.

The total number of houses will be the total number of ranches + the total number of colonials, 30 + 50 = 70. We can rewrite the table: HousesOldNewTotal

Ranch23730

Colonial04040

Total234770

The percentage of new ranches will be (7 / 70)·100 = 10%

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