Oops, just re-read the problem, the upper number is 166, not 162! but the method is the same, so the answer for part 2 should be:
(83*1+28*2+11*3+7*4+3*5+33*5)/165 = 380/165 = 76/31
Correction
本文內容已被 [ AceOnRiver ] 在 2009-12-19 10:40:17 編輯過。如有問題,請報告版主或論壇管理刪除.