[問題]考古題Form17 sec8 PS-Q14

[凱薩琳]

The King School has an enrollment of 900 students. The school day at King consists of 6 class peroids, each of which is taught by one teavher, and there is an average of 30 students per class. Of each teacher at King teaches 5 of the 6 peroids and has one peroid free, but no students has a free peroid, how many teachers does the school have?

(A)25
(B)30
(C)36
(D)60
(E)150

Ans:C

[StanleyHuang]

(1) 900個學生，每班平均30個學生=> 有 900/30 = 30 個班
(2) 一天有 六節課，所以30個班 共 30*6=180節課
(3) 一個老師一天上 五 節課，所以 180節課需要 180/5 = 36 個老師

[凱薩琳]

懂了懂了..謝謝