In fact, this is the case: the two-color ball lottery betting is divided into red ball number area and blue ball number area.

Each note number of "two-color ball" consists of 6 red ball numbers and 1 blue ball numbers. The red ball number is selected from1-33; The number of the blue ball is selected from1-16.

"Two-color ball" each bet 2 yuan. "Two-color ball" adopts the national unified prize pool.

The "two-color ball" is sold three times a week, and the number of issues is determined by the date of the lottery, arranged by calendar year.

One, two, three, four, five and six are red balls, and the seventh one is blue balls. Winning probability

There are 6 groups of red balls, one for each group 1-33, and 6 are not repeated. Then the blue ball is a two-color ball with a number drawn from 1- 16.

The winning probability of the first prize (6+ 1) is as follows: red ball 33, blue ball 6 times 161=17721088 = 0.0000056%.

The winning probability of the second prize (6+0) is: red ball161=15/17721088 = 0.0000846%.

The winning probability of the third prize (5+ 1) is: red ball 33, blue ball 5 times 161=162/17721088 = 0.0009/kloc.

The winning probability of the fourth prize (5+0,4+1) is: red ball 33, blue ball 16 for 5 times, and 0 = 7695/17721088 = 0.0434%.

The winning probability of the fifth prize (4+0,3+1) is: red ball 33+ blue ball16+0 =137475/17721088 = 0.7758%.

The winning probability of the sixth prize (2+ 1, 1+ 1) is: red ball 33 times 16 blue ball 1 = 1043640/65438+. * * * Winning rate: 6.7 1%.

Refer to the above content: Baidu Encyclopedia-China Welfare Lottery Two-color Ball