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Selecting a sample for experiment

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A researcher is randomly selecting a sample for his experiment from a group of 30 high school students, 20 college students, and 10 graduate students. Sixty per cent of each group are females and forty per cent are males. If the researcher selects a stratified random sample of n = 10, how many will be high school students? Of the high school students selected in this random sample of 10, what is the probability of selecting a female?

Reference no: EM132155854

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