wiki.aaa.js

liczbaOsob = [0.7, 2.6, 1].map(e => e/100).reduce((a,b) => a*b)*38*1000*1000;
liczbaProb = 100;
Array.from({length: liczbaProb}, () => Object.entries(Array.from({length: liczbaOsob})
                                                .map(e => Math.random()*70*365)
                                                .map(Math.floor)
                                                .reduce((obj, k) => (obj[k] = (obj[k]|0)+1, obj), {}))
           .filter(([,v]) => v > 1).length)
  .reduce((a,b)=>a+b)/liczbaProb