Statement I provides information about house ownership but not about television ownership.
Statement II gives information about the proportion of house owners who own televisions, but it doesn’t provide the total number of families with televisions.
Neither statement provides the necessary data about the total number of families with televisions.
Therefore, both statements together are not sufficient to determine the percentage of families with televisions.
When analyzing percentage-related problems, ensure that the data provided directly connects to the quantity you're asked to calculate.