Answer: A. It would be unusual because the probability of having no HD televisions is less than 0.05.
Step-by-step explanation:
We say a event is unusual if the probability of that event to get happen is less than 0.05.
From the table it is given that, the probability of Ā having no HD televisions is 0.030 which is less than 0.05.
Therefore, It would be unusual for a household to have no HD televisions because the probability of having no HD televisions is less than 0.05.