Question

C.I 0-10,10-20,20-30,30-40,40-50,50-60,-60-70,70-80,80-90,90-100 and frequency 5,4,8,12,16,15,10,8,5,2.Find mean in brainly

Answer 1

Answer:

mean = sum of all observations/total no of observations

= 5+4+8+12+16+15+10+8+5+2/10

= 85/10 = 8.5