PP-T1-DS86

[slin0717]

86. 7767-!-item-!-187;#058&005660

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 percent were females.

(2) Of those who received either an F or I, 80 percent were males.

答案選E

能請版上高手指教嗎??謝謝

[Huang Hsin-Yi]

題目問 (P+F+I)females/total=?
(1) 0.4P=females...insufficient
(2)0.8(F+I)=females ......insufficient

(1)(2) 0.4P+0.8(F+I)/P+F+I....insufficient
we do not know P+F+I=?

[slin0717]

感謝指教