结果1 题目 The probability of an event happening is ($$ \frac { 2 } { 5 } $$. This statement means that the event is likely to happenA: less than half of the timeB: half of the timeC: neverD: more than half of the time 相关知识点: 试题来源: 解析 ANone 反馈 收藏...
There is a very simple and very important rule relating P(A) and P(not A), linking the probability of any event happening with the probability of that same event not happening. For any well-defined event, it’s 100% true that either the event happens or it doesn’t happen. The GMAT...
结果1 题目 The probability of an event happening is $$ \frac { 3 } { 5 } $$(. This statement means that the event is likely to happenA: alwaysB: half of the timeC: less than half of the timeD: more than half of the time 相关知识点: 试题来源: 解析 DNone 反馈 收...
Suppose we have events A and B for which we want to determine the probability of either event occurring. Briefly describe the circumstance where we would use P(A) + P(B) - P(A and B) instead of P(A) + P(B) . Discuss the methods for finding the following two probabiliti...
Usually, the concept of probability is tied closely to chance, or something random happening.Answer and Explanation: To determine the probability of an event, E, happening, we divide the number of ways that the event can happen by the total number of outcomes. This......
In a scientific experiment, the probability of event A happening is 0.4. If the experiment is repeated 10 times, how many times can we expect event A to occur approximately? A. 2 B. 4 C. 6 D. 8 相关知识点: 试题来源: 解析 B。本题考查概率的基本概念和应用。概率为 0.4,重复 10 次...
Understanding the OR rule in probability is crucial for solving problems that involve calculating the likelihood of one event or another happening, especially in the context of the GRE exam. The simple OR rule applies when two events are mutually exclusive, meaning the probability of either event ...
The probability of an event not happening is ($$ \frac { 2 } { 3 } $$. This statement means that the event would be likely to happenA: half of the timeB: two-thirds of the timeC: less than half of the timeD: more than half of the time 相关知识点: 试题来源: 解析 CNon...
Therefore, the probability of heads on either the first or second coin is 1/2 + 1/2 − 1/4 = 3/4. Sometimes P[A and B] is equal to 0, because A and B cannot both occur. If A and B are mutually exclusive, so that P[A and B] = 0, then the addition rule simplifies to...
When working out what the probability of two things happening is, a probability/ possibility space can be drawn. For example, if you throw two dice, what is the probability that you will get: a) 8, b) 9, c) either 8 or 9?