Each of the students in a certain class received a single gr

Each of the students in a certain class received a single grade of P,F or I.What percent of the students in the class were females?
(1) of those who received a P,40% were females.
(2) of those who received either an F or I,80% were males.
E
执迷不悟2007 1年前 已收到1个回答 举报

孤城听雪 幼苗

共回答了17个问题采纳率:94.1% 举报

条件一:不解释
条件二:假设公司F员工共a名,P员工共b名,如下表
X Y
F >a/2 a/

1年前

4
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