20 people have three or more brothers and sisters. The correct answer is B. 20.
From the frequency chart shown in the image, to find out how many people have three or more brothers and sisters, we need to add the totals for the categories of 3 siblings, 4 siblings, and 5 or more siblings.
The totals given in the chart are:
- 3 siblings: 15 people
- 4 siblings: 3 people
- 5+ siblings: 2 people
Adding these numbers gives us:
15 (for 3 siblings) + 3 (for 4 siblings) + 2 (for 5 or more siblings) = 20 people
Therefore, 20 people have three or more brothers and sisters. The correct answer is B. 20.