Re: [計量] 請教一題數學
※ 引述《murai111 (明鏡止水)》之銘言：
: ※ 引述《stare (starE)》之銘言：
: : 來自於印度JJ
: : 4. There are rooms from 101 to 550 inclusive in which the starting
: rooms are numbered from 1, 2, 3 and the waiting rooms are numbered
: from 4,5,6. What is the probability that the rooms 4, 5, 6 will be
: choosed randomly?
: : 看不太懂題義>"<
: 房間從101到550
: 房號1 2 3開頭的為STARTING ROOM
: 4 5 6為waiting room
: 選到4 5 6開頭的機會有多少
: 韓網的解法 應該是這個翻義
the number of the starting rooms=399-101+1=299
the number of the waiting rooms=550-400+1=151
the probability that the rooms 4, 5, 6 will be choosed randomly
151
=------------------
299+151
不知道是不是這樣XD
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