Question:
The numbers of children in 10 families of a locality are 2, 4, 3, 4, 2, 3, 5, 1, 1, 5. Find the number of children per family.
Solution:
The numbers of children in 10 families are : 2, 4, 3, 4, 2, 3, 5, 1, 1, 5
$\therefore$ Mean $=\frac{\text { Total no. children }}{\text { Total families }}$
$=\frac{2+4+3+4+2+3+5+1+1+5}{10}=3$