The number of members in 20 families are given as:
4,6,5,5,4,6,3,3,5,5,3,5,4,4,6,7,3,5,5,7
How many families have 4 members?
Here, in th given data:
4, 6, 5, 5, 4, 6, 3, 3, 5, 5, 3, 5, 4, 4, 6, 7, 3, 5, 5, 7
We observe that 4 is occurring 4 times, therefore number of families with 4 members = 4.