What is the number of 7 or 9 from 3 1?

3 1 7 is a form of sports lottery. It is a lottery game in which seven natural numbers are selected from 01-31* * 31. Double bet, buy 9 numbers, of which: 7 out of 9 = (9x8x7) ÷ (1x2x3) = 84 notes, 1 * * needs: 84X2= 168 yuan.

Related introduction

Chinese sports lottery refers to a written certificate issued to raise funds for the development of sports undertakings, printed with numbers, graphics or words, for people to buy voluntarily and obtain the right to win prizes according to specific rules.

In a narrow sense, sports lottery refers to the lottery issued by the media of competition, which can also be called quiz-type sports lottery. Such as football lottery, baseball lottery, horse racing lottery, etc. ; Sports lottery in a broad sense refers to all kinds of sports-related lottery tickets for the purpose of issuing lottery tickets.

Sports lottery has no name, no loss report, no principal return, no interest payment and cannot be used in circulation. There are two main ways to sell sports lottery tickets in China, namely, large-scale sales of instant sports lottery tickets and computer-aided sales of traditional sports lottery tickets.