Question

Median is 24 find the missing frequency age= 0-10,10-20,20-30,30-40,40-50 no of persons = 5, 25 ,p ,18 ,7

Answer 1

median is 24, it means that class interval is 20-30.
Total number of persons are 55+p.
Cummulative frequency are: 5, 30, 30+p, 48+p, 55+p.
Median = L1+i×(N/2 - cf)/f
24= 20+10(55+p/2 - 30)/ p
by solving p=5