How many subsets does the set have?
{Children,Teen,Adult} X {male,female}
Are you asking how many subsets can be formed from the set of ordered pairs of the form "(age-type, gender-type)"? If so, how far have you gotten? How many elements did you determine the set to have? And so forth.How many subsets does the set have?
{Children,Teen,Adult} X {male,female}