结果1 题目 4 A bag contains 20 balls.5 of these balls are red. A ball is picked at random from the bag.On the probability scale, draw an arrow () to show the probability that this ball is red.Arrow at 0.2500.5田 相关知识点: 试题来源: 解析 Arrow at 0.25 反馈 收藏 ...
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。反馈 收藏 ...
<p>To solve the problem step by step, we will use Bayes' theorem and the concept of conditional probability.</p><p><strong>Step 1: Define Events</strong> Let: - \( E1 \): Event that there are 2 white balls in the bag. - \( E2 \): Event that there are 3 w
Click here:point_up_2:to get an answer to your question :writing_hand:a bag contains 18 balls out of which x balls are redi if oneball is
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
A bag contains 8 red balls and 4 blue balls. What is the ratio of red balls to blue balls? A. 1:2 B. 2:1 C. 3:1 D. 1:3 相关知识点: 试题来源: 解析 B。选项 A1:2 错误;选项 B8 个红球,4 个蓝球,红球与蓝球比例是 2:1,正确;选项 C3:1 错误;选项 D1:3 错误。
结果1 题目 34 A bag contains 51 balls. If a ball is chosen at random from the bag, the probability of choosing a red ball i 8/(17)Find the number of balls in the beg which are not red balls. A 24D B 25 C 26 D 27 相关知识点: 试题来源: 解析 D 反馈 收藏 ...
A bag contains 20 white balls and 20 red balls. (Assume that balls of same colour are distinguishable). Pair of balls are drawn at random without replacement until the bag is empty. The probability that each pair consists of one white and one real red ball is: A220×(20!)240! B220×...
A bag contains 5 white balls, 7 red balls, 4 black balls and 2 blue balls. One ball is drawn at random from the bag. Find the probability that the balls drawn is White or blue View Solution A bag contains 4 white and 5 black balls. A ball is drawn at random from the bag. Fin...
Answer to: A bag contains two pencils, one ruler, and five pens. What is the probability of randomly selecting a pen, a ruler, and a pencil without...