本课配套习题挑战模式1/5
单选题
难度系数:
1.在一个不透明的布袋中,红色、黑色、白色的玻璃球共有40个,除颜色外其他完全相同.小张通过多次摸球试验后发现,其中摸到红色、黑色球的频率稳定在15%和45%,则口袋中白色球的个数很可能是( )
A: 6 |
B: 16 |
C: 18 |
D: 24 |
一次做对,真牛!
+5奖励规则>
- 提示1:5YWI55Sx6aKR546H5LmL5ZKM5Li6Meiuoeeul+WHuueZveeQg+eahOmikeeOh++8jA==
- 提示2:5YaN55Sx5pWw5o2u5oC75pWww5fpopHnjoc96aKR5pWw6K6h566X55m955CD55qE5Liq5pWw77yM5Y2z5Y+v5rGC5Ye6562U5qGI77yO
- 答案:Qg==
6Kej77ya4oi15pG45Yiw57qi6Imy55CD44CB6buR6Imy55CD55qE6aKR546H56iz5a6a5ZyoMTUl5ZKMNDUl77yMPGJyPuKItOaRuOWIsOeZveeQg+eahOmikeeOh+S4ujEtMTUlLTQ1JT00MCXvvIw8YnI+5pWF5Y+j6KKL5Lit55m96Imy55CD55qE5Liq5pWw5Y+v6IO95pivNDDDlzQwJT0xNuS4qu+8jjxicj7mlYXpgIlC77yO
本课配套习题挑战模式2/5
单选题
难度系数:
2.在一个不透明的盒子里,装有5个黑球和若干个白球,这些球除颜色外都相同,将其摇匀后从中随机摸出一个球,记下颜色后再把它放回盒子中,不断重复,共摸球40次,其中10次摸到黑球,请估计盒子中白球的个数是( )
A: 12个 |
B: 16个 |
C: 20个 |
D: 30个 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u5YWx5pG455CDNDDmrKHvvIzlhbbkuK0xMOasoeaRuOWIsOm7keeQg++8jOWImeaRuOWIsOm7keeQg+S4juaRuOWIsOeZveeQg+eahOasoeaVsOS5i+avlOS4ujHvvJoz77yM55Sx5q2k5Y+v5Lyw6K6h5Y+j6KKL5Lit6buR55CD5ZKM55m955CD5Liq5pWw5LmL5q+U5Li6Me+8mjPvvJvljbPlj6/orqHnrpflh7rnmb3nkIPmlbDvvI4=
- 答案:QQ==
6Kej562U77ya4oi15YWx5pG45LqGNDDmrKHvvIzlhbbkuK0xMOasoeaRuOWIsOm7keeQg++8jDxicj7iiLTmnIkzMOasoeaRuOWIsOeZveeQg++8jDxicj7iiLTmkbjliLDpu5HnkIPkuI7mkbjliLDnmb3nkIPnmoTmrKHmlbDkuYvmr5TkuLox77yaM++8jDxicj7iiLTlj6PooovkuK3pu5HnkIPlkoznmb3nkIPkuKrmlbDkuYvmr5TkuLox77yaM++8jDxicj40w7c8aW1nIHdpZHRoPTUgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMUMvQUYvckJBQ0ZGVjAtVEh4djkzbkFBQUJHV01vNFpjODI0LnBuZyI+PTEy77yI5Liq77yJ77yOPGJyPuaVhemAie+8mkHvvI4=
本课配套习题挑战模式3/5
单选题
难度系数:
3.在一个不透明的盒子里装着若干个白球,小明想估计其中的白球数,于是他放入10个黑球,搅匀后从中随机摸出一个球记下颜色,再把它放回盒子中,不断重复上述过程,得到如下数据:
估算盒子里白球的个数为
摸球的次数n | 20 | 40 | 60 | 80 | 120 | 160 | 200 |
摸到白球的次数m | 15 | 33 | 49 | 63 | 97 | 128 | 158 |
摸到白球的频率 | 0.75 | 0.83 | 0.82 | 0.79 | 0.81 | 0.80 | 0.79 |
A: 8个 |
B: 40个 |
C: 80个 |
D: 无法估计 |
一次做对,真牛!
+5奖励规则>
- 提示1:5Zyo5ZCM5qC35p2h5Lu25LiL77yM5aSn6YeP5Y+N5aSN6K+V6aqM5pe277yM6ZqP5py65LqL5Lu25Y+R55Sf55qE6aKR546H6YCQ5riQ56iz5a6a5Zyo5qaC546H6ZmE6L+R77yM6KeC5a+f5Y+v55+l5qaC546H5ZyoMC445bem5Y+z77yO5Yip55So5qaC546H5YWs5byP6L+b6KGM6K6h566X77yO
- 答案:Qg==
6Kej77ya4oi15aSn6YeP5Y+N5aSN6K+V6aqM5pe277yM6ZqP5py65LqL5Lu25Y+R55Sf55qE6aKR546H6YCQ5riQ56iz5a6a5Zyo5qaC546H6ZmE6L+R77yM6KeC5a+f5Y+v55+l5qaC546H5ZyoMC445bem5Y+zPGJyPuiuvueZveeQg+aciW3kuKrvvIw8YnI+4oi0MC44PTxpbWcgd2lkdGg9MjUgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvODEvRjMvckJBQ0psVjAtVFB3dHdrMkFBQUJoLXAwWG1nOTE4LnBuZyI+77yM6Kej5b6XbT00MO+8jjxicj7mlYXpgIlC77yO
本课配套习题挑战模式4/5
单选题
难度系数:
4.甲、乙两位同学在一次用频率估计概率的实验中统计了某一结果出现的频率给出的统计图如图所示,则符合这一结果的实验可能是( )
A: 掷一枚正六面体的骰子,出现5点的概率 |
B: 掷一枚硬币,出现正面朝上的概率 |
C: 任意写出一个整数,能被2整除的概率 |
D: 一个袋子中装着只有颜色不同,其他都相同的两个红球和一个黄球,从中任意取出一个是黄球的概率 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u57uf6K6h5Zu+5Y+v55+l77yM6K+V6aqM57uT5p6c5ZyoMC4zM+mZhOi/keazouWKqO+8jOWNs+WFtuamgueOh1DiiYgwLjMz77yM6K6h566X5Zub5Liq6YCJ6aG555qE5qaC546H77yM57qm5Li6MC4zM+iAheWNs+S4uuato+ehruetlOahiO+8jg==
- 答案:RA==
6Kej562U77yaQeOAgeaOt+S4gOaemuato+WFremdouS9k+eahOmqsOWtkO+8jOWHuueOsDXngrnnmoTmpoLnjofkuLo8aW1nIHdpZHRoPTUgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQjcvQTYvckJBQ0UxVjAtVGF3ZF83QUFBQUJIOHdBZUJNNjU1LnBuZyI+77yM5pWF5pys6YCJ6aG56ZSZ6K+v77ybPGJyPkLjgIHmjrfkuIDmnprnoazluIHvvIzlh7rnjrDmraPpnaLmnJ3kuIrnmoTmpoLnjofkuLo8aW1nIHdpZHRoPTUgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvODIvMjIvckJBQ0oxVjAtVGJnVnlFbUFBQUJHTFRMV2JFNzk2LnBuZyI+77yM5pWF5pys6YCJ6aG56ZSZ6K+v77ybPGJyPkPjgIHku7vmhI/lhpnlh7rkuIDkuKrmlbTmlbDvvIzog73ooqsy5pW06Zmk55qE5qaC546H5Li6PGltZyB3aWR0aD01IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzgyLzIyL3JCQUNKMVYwLVRiZ1Z5RW1BQUFCR0xUTFdiRTc5Ni5wbmciPu+8jOaVheacrOmAiemhuemUmeivr++8mzxicj5E44CB5LiA5Liq6KKL5a2Q5Lit6KOF552A5Y+q5pyJ6aKc6Imy5LiN5ZCM77yM5YW25LuW6YO955u45ZCM55qE5Lik5Liq57qi55CD5ZKM5LiA5Liq6buE55CD77yM5LuO5Lit5Lu75oSP5Y+W5Ye65LiA5Liq5piv6buE55CD55qE5qaC546H5Li6PGltZyB3aWR0aD01IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzFDL0FGL3JCQUNGRlYwLVRIeHY5M25BQUFCR1dNbzRaYzgyNC5wbmciPuKJiDAuMzPvvIzmlYXmnKzpgInpobnmraPnoa7vvI48YnI+5pWF6YCJRO+8jg==
本课配套习题挑战模式5/5
单选题
难度系数:
5.下列说法中正确的个数是( )
①不可能事件发生的概率为0;
②一个对象在实验中出现的次数越多,频率就越大;
③在相同条件下,只要试验的次数足够多,频率就可以作为概率的估计值;
④收集数据过程中的“记录结果”这一步,就是记录每个对象出现的频率.
①不可能事件发生的概率为0;
②一个对象在实验中出现的次数越多,频率就越大;
③在相同条件下,只要试验的次数足够多,频率就可以作为概率的估计值;
④收集数据过程中的“记录结果”这一步,就是记录每个对象出现的频率.
A: 1 |
B: 2 |
C: 3 |
D: 4 |
一次做对,真牛!
+5奖励规则>
- 提示1:5Yip55So5qaC546H55qE5oSP5LmJ44CB5Yip55So6aKR546H5Lyw6K6h5qaC546H55qE5pa55rOV5a+55ZCE6YCJ6aG56L+b6KGM5Yik5pat5ZCO5Y2z5Y+v56Gu5a6a5q2j56Gu55qE6YCJ6aG577yO
- 答案:Qw==
6Kej77ya4pGg5LiN5Y+v6IO95LqL5Lu25Y+R55Sf55qE5qaC546H5Li6MO+8jOato+ehru+8mzxicj7ikaHkuIDkuKrlr7nosaHlnKjlrp7pqozkuK3lh7rnjrDnmoTmrKHmlbDotorlpJrvvIzpopHnjoflsLHotorlpKfvvIzmraPnoa7vvJs8YnI+4pGi5Zyo55u45ZCM5p2h5Lu25LiL77yM5Y+q6KaB6K+V6aqM55qE5qyh5pWw6Laz5aSf5aSa77yM6aKR546H5bCx5Y+v5Lul5L2c5Li65qaC546H55qE5Lyw6K6h5YC877yM5q2j56Gu77ybPGJyPuKRo+aUtumbhuaVsOaNrui/h+eoi+S4reeahOKAnOiusOW9lee7k+aenOKAnei/meS4gOatpe+8jOWwseaYr+iusOW9leavj+S4quWvueixoeWHuueOsOeahOmikeeOh++8jOmUmeivr++8jDxicj7mlYXpgInvvJpD77yO