raffle.rb

require 'pp'

class Array
  def average
    inject(0.0) { |sum, e| sum + e } / length
  end
end

res = {}

['naoise','alejandro','erick'].each do |name|
  res[name] = 1_000_000.times.map { rand }.average
end

winner = res.sort_by { |k,v| v }.last.first

puts "And the winner is #{winner}"