D
i got it right on the unit test review
Answer:
80.
Step-by-step explanation:
Let be the set of people who like cats and the set of people who like dogs. Under the cardinality theorem you have
n(CUD) = n(C) + n(D) - n(CnD)[/tex], isolating the ∩ , you have n∩ = n(C) + n(D) - ∪∩
5
6 x 3 = 18
90 / 18 = 5