Geometry

Question Analysis
This question involves using a frequency table to calculate the probability of two independent events occurring in sequence.
The main focus is on understanding the concept of independent events, calculating individual probabilities from the frequency table, and then multiplying these probabilities together.

Key Concept Explanation
For two independent events and , the probability of both and occurring, denoted as , is .
Probability of an event is calculated as .

Step-by-Step Solution
First, find the total number of families:

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