balls of the same color are indistinguishable. Assume that n≤bn≤b,n≤wn≤wzk=zk= the number of ways in which nn balls can be drawn randomly, without replacement from this bag containing bb black balls and ww white balls, when kk of the nn balls drawn are white ...
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....
From a bag containing 12 identical blue balls, y identical yellow balls, and no other balls, one ball will be removed at random. If the probability is less than that the removed ball will be blue, what is the least number of yellow balls that must be i
【题目】14 A bag contains 4 red balls, 2 white balls, 1 yellow ball and some blue balls. They areidentical except for the colour. Xiao Ming thinks that since there are 4 different colours ofballs in the bag, when a ball i randomly picked from it, the chance of getting a red ball,...
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 ...
1【题目】A bag contains 100 marbles (small glass balls) of similar size and texture. The marbles areeither white or purple, and the number of each is not known. A marble is randomly takenfrom the bag and replaced before another is taken out. 20 marbles are chosen in this way.The resul...
Click here:point_up_2:to get an answer to your question :writing_hand:a bag contains 5 white balls 6 red balls and
A bag contains 5 red balls and 3 blue balls. The probability of drawing a red ball at random is ___. A. 3/8 B. 5/8 C. 3/5 D. 5/3 相关知识点: 试题来源: 解析 B。袋子里一共有 8 个球,其中 5 个是红球,随机抽取一个球是红球的概率就是红球的数量除以总球数,即 5/8。选项...
A bag contains 5 red balls and 3 blue balls. If a ball is randomly drawn, what is the probability of getting a red ball? A. 3/8 B. 5/8 C. 3/5 D. 5/3 相关知识点: 试题来源: 解析 B。本题考查概率的计算。袋中共有 8 个球,其中 5 个红球,随机抽取一个球,抽到红球的概率为...
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。