muda-que-da.js

const shuffle = (array) => {
  var currentIndex = array.length, temporaryValue, randomIndex;

  // While there remain elements to shuffle...
  while (0 !== currentIndex) {

    // Pick a remaining element...
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;

    // And swap it with the current element.
    temporaryValue = array[currentIndex];
    array[currentIndex] = array[randomIndex];
    array[randomIndex] = temporaryValue;
  }

  return [... array];
}

const letters = ['A', 'B', 'C']
let correctTimes = 0
const times = 1000
let str = ''

for (let x = 0 ; x < times ; x++) {

  const game = shuffle(letters)
  const correctAnswer = game.indexOf('A')
  const playerChoice = shuffle(game)[0]
  const virouPrimeira = shuffle([...game].filter((i) => ((i !== playerChoice) && i !== 'A')))[0]
  const jogadorTrocouCarta = [...game].find((i) => ((i !== virouPrimeira) && i !== playerChoice))[0]
  const acertou = playerChoice === 'A'
  
  if (acertou) correctTimes++
 
  str += `##############\n
    Jogo: ${game.toString()}\n
    Escolha do jogador: ${playerChoice}\n
    Jogo virou: ${virouPrimeira}\n
    Jogador trocou para: ${jogadorTrocouCarta}\n
    Acertou?: ${acertou}\n
    ##############\n`
  }
  document.querySelector('#root').innerText = str
  document.querySelector('#final').innerText = `Porcentagem de acerto ${(correctTimes/times) * 100}%\n`