Question

Cecilia's mom ordered pizza for dinner. The pizza has two slices of pepperoni, two slices of mushroom, and two slices of anchovy. Cecilia asks her brother to bring her two slices. List all the possible combinations where the first choice is pepperoni.

Answer 1

If the first slice is pepperoni, then we have left:

1 slice of pepperoni.

2 slices of mushrooms.

2 slices of anchovy.

Then the possible combinations are:

Pepperoni and pepperoni (in only one combination)

Pepperoni and mushrooms (in two combinations, because there are two slices left)

Pepperoni and anchovy (Again in two combinations, because there are two slices left)

These are the 3 possible combinations, 5 in total.