In a school,5% of the students are members of the Mathematics Club. If a student is chosen at random,what is the probability that the studenr is not a member of the Mathematics Club?
the ans is 19/20(19over20)
LIST OUT ALL THE THINGS AND METHOD!!!
急Maths....10pts
2006-11-23 2:49 am
回答 (3)
2006-11-23 2:59 am
✔ 最佳答案
let in the school has 100 studentsmembers of Mathematics Club in the school
= 100 X 5%
= 5 students
not mathematics club member in the school
= 100 - 5
= 95 students
so the probability that the student is not a member of the Mathematics Club
= 95/100
= 19/20
2006-11-23 4:30 am
19/20=95%=0.95
the probability that the studenr is not a member of the Mathematics Club
not memberis1-5%=95%
so ans is95%
the probability that the studenr is not a member of the Mathematics Club
not memberis1-5%=95%
so ans is95%
2006-11-23 3:01 am
設the students is not a member of the Mathematics Club ｉｓ ｘ％：
１００％－５％＝ｘ％
１００／１００－５／１００＝ｘ／１００
９５／１００＝ｘ／１００
９５＝ｘ
ｘ＝９５
可能錯
2006-11-22 19:02:14 補充：
９５＝９５／１００＝１９／２０
１００％－５％＝ｘ％
１００／１００－５／１００＝ｘ／１００
９５／１００＝ｘ／１００
９５＝ｘ
ｘ＝９５
可能錯
2006-11-22 19:02:14 補充：
９５＝９５／１００＝１９／２０
收錄日期: 2021-04-13 18:30:54
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https://hk.answers.yahoo.com/question/index?qid=20061122000051KK02994