SAT历年真题At a track meet,2/5 of thefirst-place finishers atten
SAT历年真题
At a track meet,2/5 of the
first-place finishers attended Southport High School,and 1/2 of them were
girls.If 2/9 of the first-place finishers who did NOT attend Southport High
School were girls,what fractional part of the total number of first-place
finishers were boys?
(A) 1/9 (B) 2/15 (C) 7/18 (D) 3/5 (E) 2/3