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
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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
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
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
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/b