解析 15 In the worst-case scenario, he must take out. red white yellow blue black 1 1 1 1 1 1 1 1 1 1 1 1 1 1 14+1=15 The least number of balls that Jonathan must take out from the bag in order to have at least 4 balls of the same colour is 15....
A box contains exactly 24 balls, of which 12 are red and 12 are blue. If two balls are to be picked from this box at random and without replacement, what is the probability that both balls will be red? 选项: A、 B、 C、 D、...
1【题目】A box contains 28 red balls,20 green balls,19 yellowballs,13 blue balls,11 white balls,and 9 black balls.What is the minimum number of balls that must bedrawn from the box without replacement to guarantee that at least 15 balls of a single color will be drawn?()A.75B.76C...
There are 10 balls in a box, 3 of them are red. What is the probability of drawing a red ball? A. 1/10 B. 3/10 C. 7/10 D. 1/3 相关知识点: 试题来源: 解析 B。解析:总共有 10 个球,其中 3 个是红色的,所以抽到红球的概率是红球的数量除以总球数,即 3/10。A 选项是抽到...
百度试题 结果1 题目A bag contains 4 red balls, 2 green balls and 3 blue balls. A ball is drawn and not replaced. A second ball is drawn. Find the probability of drawing: One green ball and one red ball. 相关知识点: 试题来源: 解析 29 ...
A box contains 10 red balls and 15 blue balls. If two balls are randomly drawn without replacement, what is the probability that both are red? A. 10/25 × 9/24 B. 10/25 × 10/24 C. 15/25 × 14/24 D. 15/25 × 15/24 ...
A bag contains red and blue balls. The ratio of red balls to blue balls is 3:5. If there are 24 red balls, how many blue balls are there? A. 40 B. 30 C. 20 D. 10 相关知识点: 试题来源: 解析 A。解析:设蓝球有 x 个,24:x = 3:5,3x = 120,解得 x = 40。
相关知识点: 试题来源: 解析 B。本题考查比例的英语表达。red balls(红球)有 12 个,blue balls(蓝球)有 8 个,ratio of red balls to blue balls(红球与蓝球的比例)是 12:8,化简后为 3:2。A 选项 2:3 错误;C 选项 4:3 错误;D 选项 3:4 错误。
答案 A_(175)_(ne)r=6相关推荐 1A bag contains red, green and blue balls in a ratio of 3 : 4 : 5.If there are 48 green balls, how many balls are in the bag?144How many red balls are there if there are 24 balls in total?
A box contains 10 red balls and 20 blue balls. If you randomly pick one ball, the probability of getting a red ball is: A. 1/3 B. 1/2 C. 2/3 D. 1/4 相关知识点: 试题来源: 解析 A。总共有 10 + 20 = 30 个球,红球有 10 个,所以概率是 10÷30 = 1/3。