Question: 1. Determine the probability that in a class of 23 students two or more students have birthdays on January 1.
2. Use a computer simulation to verify your result in Problem 3.38.
3. A pizza can be ordered with up to four different toppings. Find the total number of different pizzas (including no toppings) that can be ordered. Next, if a person wishes to pay for only two toppings, how many two-topping pizzas can he order?