Is Geoff Right? He is

is_geoff_right.rb

# To run this just install Ruby (it's already on Macs), download this file
# into a folder, open your terminal and `cd` into that folder type:
# `ruby is_geoff_right.rb`

cars = 0
goats = 0

1000000.times do
	doors = [:car, :goat, :goat]

	first_choice = doors.delete_at(rand(3))

	remaining_doors = if doors[0] == :goat
		[first_choice, doors[1]]
	else
		[first_choice, doors[0]]
	end

	our_choice = remaining_doors[1]

	if our_choice == :car
		cars += 1
	else
		goats += 1
	end
end

puts "Cars: #{cars}     Goats: #{goats}"