Probability theory is the probability of an event occurring, the basic concept of probability of sev

In fact, there are many answers. Of course, I'm just going to say my own opinion here.

Let's put it this way: there is a box with only two black balls in it. Then the probability that we can't get a white ball is 1

It's a given. There is a premise for this, and only if we have the ball in the box. A necessary event means that it will happen.

But if we do nothing. It's that we don't get the ball. Although the probability of not being able to get a white ball is 1, this event did not happen.

But once the ball is held, it must be an inevitable event. In other words, the inevitable event here is defined as: the event corresponding to this time!

This is naturally inevitable because it has already happened. But there were many choices for this event, but only one was chosen, and there was only one inevitable result. If you choose something else, there will be other corollaries.

This is not true for all definitions. For example, a small ball has mass.

This is obviously inevitable. No matter how you qualify, it will happen.

The probability of a necessary event is 1, which is easy to understand. It's what happened, it's [the facts]. Then his probability is 1No doubt.

For example, if you are a boy, the probability that you are a boy is 1

A time with a probability of 1 is not necessarily inevitable, if you are a boy and the probability that you like a girl is 1, it means that you should have a very, very high probability of liking a girl. This 1, in fact, you can understand as a number that is infinitely close to 1, but not really equal to 1.

But obviously, you can like boys too

<>1. Random event: one result of randomized trial E, referred to as an event;

2. Basic events: the results of each non-redecomposable random trial E;

3. Sample space: the set of all basic events in randomized trial E;

4. Inevitable events: under certain conditions, the events that must occur in each test;

5. Impossible event: under certain conditions, the event that must not occur in each test;

6. Mutually exclusive event: In the test, if event A and agitation B cannot occur at the same time, A and B are called mutually exclusive events;

7. Opposing event: In each experiment, the event of "event A does not occur" is called the opposite event of event A.

<>1. Random event: one result of randomized trial E, referred to as an event;

2. Basic events: the results of the non-redecomposition of each cavity in the randomized trial E;

3. Sample space: the set of all basic events in randomized trial E;

4. Inevitable events: under certain conditions, the events that must occur in each test;

5. Impossible event: an event that must not occur in each test under a certain number of arguments;

6. Mutually exclusive event: In the test, if event A and B cannot occur at the same time, A and B are called mutually exclusive events;

7. Opposing event: In each experiment, the event of "event A does not occur" is called the opposing event of event A.

<>1. Random event: one result of randomized trial E, referred to as an event;

2. Basic events: the results of each non-redecomposable of randomized trial e;

3. Sample space: a collection of all basic events in randomized trial E;

4. Event: Under certain conditions, the event that must occur in each test;

5. Impossible event: under certain conditions, the event that must not occur in each test;

6. Mutually exclusive event: In the test, if event A and B cannot occur at the same time, A and B are called mutually exclusive events;

7. Antagonistic event: In the test of each clan, the event of "event A does not occur" is called the antagonistic event of event A.

1.Randomized congratulatory event: one outcome of randomized trial e, referred to as an event;

2.Fundamental Event: Each non-redecomposable fruit of randomized trial e sells positively;

3.Sample space: Composition of all basic events of randomized trial e **4Inevitable event: an event that must occur in each test under certain conditions;

5.Impossible event: Under certain conditions, an event that must not occur in each Zen repatriation test;

6.Mutually exclusive event: In the experiment, if event A and B cannot occur at the same time, A and B are called mutually exclusive events;

7.Opposing events: In each trial, the event that "event A does not happen" is called the opposing event of event A.

abc = abc + abc + abc, right!

The same can be ,......

Finally, AB+AC+BC was launched