You were thrilled at the binomial distribution calculator, now gasp in awe at the negative binomial distribution calculator!

http://www.roulettician.com/software.htmlI've also add a new option to both calculators. You can now select "between". For example, what is the probability that there are between 2 and 5 wins in 10 spins, when betting on a double street?

- The probability of a DS is 6/37 = 0.1622
- Select the "Between" option
- Enter 2 followed by a comma, followed by 5 in the "successes" box.
- Enter 10 in the number of trials box.
- Click COMPUTE!

What is the probability that there will be between 4 and 11 losses before the 2nd win, when betting on a Quad?

- Probability of a Quad = 4/37 = 0.108
- Select "Between"
- Enter 4, followed by comma, followed by 11 in the "failures" box.
- Enter 2 in the "successes" box.
- Click COMPUTE!