高中數學 第二章 概率 2.3 條件概率與獨立事件 2.3.1 條件概率課件 北師大版選修23

《高中數學 第二章 概率 2.3 條件概率與獨立事件 2.3.1 條件概率課件 北師大版選修23》由會員分享，可在線閱讀，更多相關《高中數學 第二章 概率 2.3 條件概率與獨立事件 2.3.1 條件概率課件 北師大版選修23（22頁珍藏版）》請在裝配圖網上搜索。

1、3 3條件概率與獨立事件條件概率與獨立事件第1 1課時條件概率目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知

2、識梳理1.理解條件概率的定義,掌握條件概率的計算方法.2.利用條件概率公式解決一些簡單的實際問題.目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLI

3、AN隨堂演練ZHISHISHULI知識梳理目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理【做一做1】

4、條件概率P(B|A)表示()A.事件B與事件A的概率之差B.事件B與事件A的概率之商C.事件B與事件A的概率之積D.在事件A發(fā)生的條件下,事件B發(fā)生的概率答案:D目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳

5、理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGY

6、ANLIAN隨堂演練ZHISHISHULI知識梳理題型一題型二題型三【例1】 盒中裝有5個產品,其中3個一等品,2個二等品,不放回地從中取產品,每次取1個.求:(1)取兩次,兩次都取得一等品的概率;(2)取兩次,第二次取得一等品的概率;(3)取兩次,已知第二次取得一等品的條件下,第一次取得的是二等品的概率.分析:由于是不放回地從中取產品,所以第二次抽取受到第一次的影響,因而是條件概率,應用條件概率中的乘法公式求解.目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGY

7、ANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理題型一題型二題型三目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHU

8、LI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理題型一題型二題型三反思條件概率的判斷:當題目中出現“在前提下(條件)”等字眼時,一般為條件概率;題目中沒有出現上述字眼,但已知事件的發(fā)生影響了所求事件的概率,一般也認為是條件概率.對于古典概型類題目,可采用縮減基本事件總數的辦法來計算, 表示事件AB包含的基本事件個數,n(A

9、)表示事件A包含的基本事件個數.目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理題型一題型二題型三【變式

10、訓練1】 (1)某校高二(1)班有學生56人,其中籃球愛好者25人.全班分成4個小組,第一組有學生16人,其中籃球愛好者7人.從該班任選一人作為學生代表.選到的是第一組的學生的概率是,已知選到的是籃球愛好者,他是第一組學生的概率是.目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典

11、例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理題型一題型二題型三目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂

12、演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理題型一題型二題型三【例2】 在某次考試中,要從20道題中隨機地抽出6道題,若考生至少能答對其中4道題即可通過,至少能答對其中5道題就獲得優(yōu)秀.已知某考生能答對其中10道題,并且知道他在這次考試中已經通過,求他獲得優(yōu)秀成績的概率.分析:考生成績優(yōu)秀包括兩種情形:該考生答對5道題或6道題,這兩種情形是互斥的,在該考生考試通過的前提下,求獲優(yōu)秀的概率.只需利用條件概率的性質求解.目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演

13、練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理題型一題型二題型三目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標

14、導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理題型一題型二題型三反思(1)條件概率的性質:若B與C是兩個互斥事件,則P(BC|A)=P(B|A)+P(C|A).(2)當所求事件的概率相對較復雜時,往往把該事件分成兩個(或多個)

15、互不相容的較簡單的事件之和,求出這些簡單事件的概率,再利用P(BC)|A)=P(B|A)+P(C|A)便可求得較復雜事件的概率.目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典

16、例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理題型一題型二題型三目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂

17、演練ZHISHISHULI知識梳理題型一題型二題型三易錯點“條件概率P(B|A)”與“積事件的概率P(AB)”混淆【例3】 袋中有6個黃色、4個白色的乒乓球,不放回抽取,每次任取一球,取兩次,求第二次才取到黃球的概率.目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUIT

18、ANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理123456目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISH

19、ULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理123456目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI

20、典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理1234563.兩位工人加工同一種零件共100個,甲加工了40個,其中35個是合格品,乙加工了60個,其中有50個合格,令事件A為“從100個產品中任意取一個,取出的是合格品”,事件B為“從100個產品中任意取一個,取到甲生產的產品”,則P(A|B)等于()目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透

21、析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理123456目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHI

22、SHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理123456目標導航知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練知識梳理典例透析隨堂演練目標導航知識梳理典例透析隨堂演練目標導航目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理目標導航DIANLITOUXI典例透析SUITANGYANLIAN隨堂演練ZHISHISHULI知識梳理123456