Following bar chart represents the number of children in a family:
5
4
3
6
Family no. 3 has number of children 3.
Suppose one makes a survey of 20 families in the colony and find out the number of children in each family. The number of children in each family are 2, 2, 2, 3, 1, 1, 2, 3, 2, 2, 1, 2, 2, 3, 1, 2, 1, 1, 3, 2 .State the frequency of each observation and also draw the tally chart. [3 MARKS]
The following table gives the number of children of 150 families in a village No. of children (x) : 0 1 2 3 4 5 No. of families (f) : 10 21 55 42 15 7 Find the average number of children per family.