【官方】SAT数学每日一题附答案和解析(2018年3月5日)

小站整理2018-03-10 11:13:54

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摘要：春天来了，3月份的考试也马上来临了，小可爱们准备的怎么样了？每日一题的内容是由sat官方所出，质量虽不比真题，但备考期间，由于有效备考资料珍贵有限。大家可以每天拿官方的Daily Practice来练手。以下是2018年3月5日的SAT数学练习部分：

每日一练：数学

Mathematics>Standard Multiple Choice

Read the following SAT test question and thenclick on a button to select your answer.

The table above gives the results of a survey about whether or not participants brought alaptop on their most recent vacation. If one of the participants is selected at random, what isthe probability that the participant is female, given that the participant brought a laptop onvacation? (Round your answer to the nearest hundredth.)

A..21

B..32

C..40

D..65

答案：D

解析：

Choice D is correct. In the sample, the total numberof participants who brought laptops on vacation was324. It is given that the participant brought alaptop on vacation. Therefore the probability thatthe participant was female given that the participant brought a laptop on vacation is theprobability of selecting a female from the group of participants who brought laptops. This canbe calculated as 212/324≈.65. Therefore the probability of selecting a female given that aparticipant brought a laptop on vacation is approximately .65.

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