Probability formula of lottery two-color ball

How to calculate the winning probability of two-color ball?

1. Basic rules of two-color ball

Two-color ball is a lottery game sponsored by China Welfare Lottery Distribution Management Center, which is common in major underground lottery stations and official channels. The rule of two-color ball is simple. Select six red balls and 1 blue balls. If the selected number is consistent with the current lottery number, you can win the prize. However, its probability of winning is very low. Therefore, it is very necessary to understand the calculation method of winning probability of two-color ball.

2. Calculation method of winning probability of two-color ball

The formula of winning probability of two-color ball is: winning probability = number of selected numbers consistent with winning numbers/total number of winning numbers. In the two-color ball, the total winning numbers are the sum of 33 red balls and 16 blue balls, that is, 49 balls. Therefore, when you select six red balls, the number of numbers consistent with the winning number is 6, and the total number of red balls is 33, so the winning probability is 6/33, which is approximately equal to 0. 18 18. Similarly, when 1 blue balls are selected, the number of selected numbers consistent with the winning number is 1, and the total number of blue balls is 16, so the winning probability is116, which is about 0.0625.

3. Calculate the total probability of winning the two-color ball.

In the two-color ball, you have to win 6 red balls and 1 blue balls at the same time to win the first prize, which is the highest prize. According to the principle of multiplication, the winning probability of the first prize can be obtained by multiplying the winning probability of the red ball and the blue ball. So the winning probability of the first prize is 0. 18 18 multiplied by 0.0625, which is about 0.000000969. The winning probability of the second prize is that the number of selected numbers consistent with the winning number is 5 red balls and 1 blue balls divided by the total number of winning numbers, that is, (5 out of 6) * (65438+10)/49, which is about 0.0000 1845. Similarly, the winning probability of the third prize is that the number of picks consistent with the winning number is 4 red balls and 1 blue balls divided by the total number of winning numbers, that is, (4 out of 6) * (1pick 1)/49, which is about 0.00968. The winning probability of other prizes is also calculated in a similar way.

4. How to improve the winning probability?

In the two-color ball, in addition to lottery luck, there are some ways to improve the probability of winning. First of all, you can choose a commonly used number, such as a number that has been frequently sent recently. Secondly, we can use charts and other tools to analyze the recent lottery situation and see if there are any rules or trends to follow. Finally, you can choose double betting, that is, you can choose multiple groups of numbers to bet, which will increase the probability of winning and the bonus will increase in proportion.

summary

When buying lottery tickets, you should be careful not to indulge too much, so as not to affect your daily life. At the same time, it is very necessary to know the calculation method of winning probability of two-color ball, which can improve the accuracy of your number selection and thus have a greater chance of winning.