Proportion of obtaining a female


The animal colony at a hospital contains 20 female rats and 30 male rats. Of the 20 females, 15 are white and 5 spotted. Of the 30 males, 15 are white, and 15 are spotted. Suppose that you randomly select 1 rat from this colony. What is the probability, as a proportion, of obtaining a female?

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Basic Statistics: Proportion of obtaining a female
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