Question

Age( in years) 0 -10 10 -20 20-30 30-40 40-50
No.of family members 5 2x 12 3x 18
Suppose there are total 60membersvin the family, then find n .Find the median age of the family members.

Answer 1

CI F CF NEW CF

0-10 5 5 5
10-20 2x 5+2x 15
20-30 12 17+2x 27
30-40 3x 17+5x 42
40-50 18 35+5x 60
total = 60
35+5x= 60
5x = 60-35
5x=25
x= 5

median = l +[n/2-cf]/f × h
= 30 + [30-27/15]×10
= 30 + 2
= 32
so median of this data is 32.......

Answer 2

Answer :-

Median = 32.5

Explanation in the photos above