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SAT官方每日一题附答案和解析[数学](2020年5月28日)

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答案:C

解析:

Choice C is correct. Using the information provided in the table, we find:

The total number of Gupta flies sampled in 2001 is 2604+2681+2640=7925.

The number of Gupta flies that were sampled in either the Botanical Garden or Farroupilha Park is 2604+2681=5285.

The probability that one of the sampled Gupta flies in 2001 was found in either the Botanical Garden or Farroupilha Park is the ratio of the number of Gupta flies sampled in these two parks over the total number of Gupta flies sampled in 2001. Calculate this ratio as a percentage: Probability=5285/7925≈0.67=67%

Therefore, the probability that one of the sampled Gupta flies in 2001 was found in either the Botanical Garden or Farroupilha Park is approximately 67%.

重点单词   查看全部解释    
probability [.prɔbə'biliti]

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n. 可能性,或然率,机率

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multiple ['mʌltipl]

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adj. 许多,多种多样的
n. 倍数,并联

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calculate ['kælkjuleit]

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v. 计算,估计,核算,计划,认为

 
species ['spi:ʃiz]

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n. (单复同)物种,种类

 
approximately [ə'prɔksimitli]

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adv. 近似地,大约

 
invasive [in'veisiv]

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adj. 侵略性的;攻击性的

 
frequency ['fri:kwənsi]

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n. 频繁,频率

 

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