The answer depends on where his wife and children lived and whether or not the taxpayer chooses to file a joint return. If his wife and children lived for more than six months at the home in the United States and she qualifies for EITC, he would qualify for EITC if he filed a joint return with his spouse. If his wife and children lived with him for more than six months outside the U.S., he would not qualify.
On average there are: 6 slices per small (8-10) pizza, 8 slices per 12 inch pizza (medium), 10 slices on a large (14-16) pizza and 12 slices on an extra-large pizza. You should confirm the number of slices before ordering because this will vary between pizza providers.
The number of slices per person definitely depends on your audience. When my daughter used to swim, I bought 12 large pizzas for around 25 swimmers after a 2 hour practice. This was on top of a bunch of other food other people bought. They wiped out the pizzas in about 10 minutes and wanted more. These were all 8-17 years skinny kids. Lol.