In a local school district, the high school and middle school each received r dollars toward funding for the student arts program. The high school enrolled 150 students and the middle school enrolled 75 students. Later, the middle school transferred s dollars to the high school so that they would have received the same funding per student. Which of the following is equivalent to s?	Choose one: A) r/8 B) r/5 C) r/2 D) r/3 E) r/9
Total per head = 2r/225   After s transfer both schools have total for head.   So at High School it will be:   r+s = (150)* (2r/225) = 12r/9=4r/3   i.e. s = 4r/3 - r/1 =4r-3r/3=r/3   Answer :r/3
<result>D</result>
In a local school district, the high school and middle school each received r dollars toward funding for the student arts program. The high school enrolled 150 students and the middle school enrolled 75 students. Later, the middle school transferred s dollars to the high school so that they would have received the same funding per student. Which of the following is equivalent to s?