Final answer:
The domain of p(n) is the set of all possible sums of two six-sided dice, ranging from 2 to 12; hence, the appropriate number type for the domain of p(n) is natural numbers. The correct choice is (1) Natural numbers.
Step-by-step explanation:
The question asks which number type is more appropriate for the domain of p(n), the probability function that models the chance of rolling a sum of n with a pair of six-sided dice.
The domain of p(n) is the set of all possible sums that can be obtained by rolling two dice.
Since the least sum possible is 2 (1+1) and the greatest is 12 (6+6), and since the dice can only show natural numbers, the appropriate domain for p(n) will also be natural numbers.
Therefore, the correct choice is (1) Natural numbers.