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 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.