Each of the students in a certain class recieved a single grade of P,F,or I. What percent of the students in the
class were females?
1) Of those who recieved a P, 40% were females
2) Of those who recieved either an F or I, 80% were males.
Stat 1 unsuff: doesnt give information about F & I and the number of students who received P
Stat 2 unsuff: doesnt give information about P and the number of students who received F or I
If we combine them we still dont have info about the nb of students in each categorie => ans. E