Re: [閒聊] 考題中的棒球已回收
看板Baseball作者LaodaIsHere (馬個b☆煞氣a小窄宅★)時間8年前 (2016/05/18 15:25)推噓21(24推 3噓 54→)留言81則, 21人參與討論串4/6 (看更多)
※ 引述《nichaellin (憤怒男 呼嚕嚕)》之銘言:
: ※ 引述《vavamk (自摸十萬)》之銘言:
: : 不是題目問題,他有算給我看過,可以解,只是我看不懂)
: : 主審判決的100顆好球中,有80顆確實是好球。
: : 主審判決的100顆壞球中,有90顆確實是壞球。
: : 請問這次判決,確實是好球的機率是多少。
:
好球判決中100顆 有80顆好球 20顆壞球
壞球判決中100顆 有10顆好球 90顆壞球
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總共判決了200顆 有90顆好球 110顆壞球
90 / 200 x 100% = 45% #
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Sent from JPTT on my Asus ASUS_Z00ED.
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