Answer:
57%
Explanation:
We are given the results of survey of one thousand families to determine the distribution of families by their size.
We are to find the probability (to the near percent) that a given family has 3, 4 or 5 people.
Frequency of families with 3, 4 or 5 people = 200 + 245 + 125 = 570
Total frequency = 1000
P (families with 3, 4 or 5 people) = (570 / 1000) × 100 = 57%