120號巴士每30min開一班車, 陳小姐只需等車5min內的概率是...
a)1/5 b)1/6
若是1/5 , 是否0min,1min,2min,3min,4min,5min/30...(6/30 = 1/5)
若是1/6 , 是否1min,2min,3min,4min,5min/30...(5/30 = 1/6)
收錄日期: 2021-04-21 22:08:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100108000051KK01536