the better deal would be '5 Pizzas for $19' because you would only pay $3.80/pizza. Where as 3 pizzas for $12.00, you would have to pay $4/pizza. As for the two first options ie 1 pizza for $5 and 2 pizzas for $10, you would have to pay $5/ per pizza. Therefore 5 pizzas for $19.00 woul indeed be the better deal. :)
