Question

The following is the distribution of ages of 200 persons.Calculate the average age.

Age(in years)I No. Of Persons
-------------------I -- - - - - - - - - - - -
Below 10 I 10
Below 20 I 25
Below 30 I 85
Below 40 I 140
Below 50 I 190
Below 60 I 200

Answer 1

The average = (10+20+30+40+50+60)/6
=>210/6
= >35

May this help you...