s10-binomial-distribution-1.js

function processData(input) {
  //Enter your code here
  input = input.split(' ')

  let b = parseFloat(input[0]),
    g = parseFloat(input[1])

  function combination(n, x) {

    let p = 1

    for (let i = x + 1; i-- > 1;) {
      p *= (n + 1 - i) / i
    }

    return p
  }

  function binomial(x, n, p) {
    return combination(n, x) * Math.pow(p, x) * Math.pow(1 - p, n - x)
  }

  function cumulativeProbability(n, p, i) {
    let s = 0

    for (let j = n + 1; j-- > i;) {
      s += binomial(j, n, p)
    }

    return s
  }

  let p = b / (g + b)

  console.log(cumulativeProbability(6, p, 3).toFixed(3))
}

processData(`1.09 1`)