Consider the following frequency table for the number of children in American families.

a. According to the data, how many families are there in America?

b. How many families have two or fewer children?

c. What percentage of American families have no children?

d. What percentage of American families have three or more children?

Number of children               Number of families (millions)

0…………………………………………35.54

1…………………………………………14.32

2…………………………………………13.28

3…………………………………………..5.13

4 or more…………………………………1.97