How to calculate the probability of two-color ball number? .

The probability of 16 first prize among 33 red balls is as follows: 6 red balls (33*32*3 1*30*29*28) divided by (6*5*4*3*2* 1) is equal to1/. 1 107568 Basketball16107568 *16 =17721088 (basketball * * bets so much), that is, No.1 middle school. I hope it helps you!