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Theory

‣‣‣ Mean = (Sum Of All The Numbers) / (Total Number Of Numbers)

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Average = (Total Number of Houses *16% * 0 + Total Number of Houses *8% * 1 + Total Number of Houses *24% * 2 + Total Number of Houses *20% * 3 + Total Number of Houses *20% * 4 + Total Number of Houses *12% * 5 or more) / Total Number of Houses

If the last number of televisions was a fixed number instead of 5 or more then we would ahve found the average.
But in this case we cannot find it.

So, Answer will be A.
Hope it helps!

Watch the following video to Learn the Basics of Statistics