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A student is to be selected at random from a certain class. The probability that the student will be a female is $$p$$, the probability that the student will be under the age of $$19$$ is $$r$$, and the probability that the student will be a female and under the age of $$19$$ is $$0.3$$. Which of the following could be the values of $$p$$ and $$r$$?
Indicate all such values.
C,D,E显示答案
· 相关考点
6.4.5 概率中的集合问题
6.4.5 概率中的集合问题
以上解析由 考满分老师提供。
