# A few days ago, when the Observer category discussed T

#### Bymijanbokul

Jul 26, 2022

According to Wikipedia : In probability theory and statistics, the expected value of a discrete random variable (or mathematical expectation, also referred to as expectation, called expected value in physics) is the result of each possible outcome in an experiment multiplied by its result the sum of the odds. In other words, the expected value is like a random experiment repeated many times with the same chance, and the result, averaged over all those possible states, is basically the same as the expected number of “expected value”. The expected value may not be equal to each result. In other words, the expected value is a weighted average of

## I don’t understand it very well, right?

As long as the reader understands a concept, the expectation is positive, and it is a way Portugal Phone Number to make money. Let’s take an example to illustrate it more clearly. Suppose there are 6 players who invest 100 yuan each, each chooses 1-6 points in the dice (not repeated), rolls the dice once, and the player with the corresponding number of points can get 600 yuan. Should this . If the bonus is greater than the sum of everyone’s contributions, you will make money.

### If the bonus is less than the sum of everyone’s

Contributions, you will lose money If they are equal, it is a no-win game Next, let’s go to our topic – scratching music. Is scratch-off a money-making game or a money-losing game? We choose the golden drum in the 100 yuan scratch music to understand. According to the bonus structure announced by Taiwan Lottery on December 30, 2021, the bonus structure is as follows. We only need to calculate the total bonus and the sum of everyone’s investment. And calculate the positive and negative of the expected value. The following is an example of the scratch-off music “Golden Drum Lucky”: