Moreno Hardy
03/04/2024 · Middle School

A group of students sat for the BM and English papers in an exam. Their results are summarized as shown : \( 75 \% \) pass BM, \( 70 \% \) pass English, \( 40 \% \) fail in at least one of the subjects. A student is selected from the group, (a) Find the probability that the student passes only one of the two subjects. (b) Given that the students passes BM or English, find the probability that the student did not pass English.

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(a) 学生仅通过一门科目的概率为 \( 0.25 \)。 (b) 在通过 BM 或英语的条件下,未通过英语的概率约为 \( 0.1176 \)。

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