Question

Find mean 20,30,40,50,60,70
Frequency 8,12,20,10,6,4

Answer 1

sum of the observations/no. of observations = mean

20+30=40+50+60+70+8+12+20+10+6+4/12=26.5

Step-by-step explanation:

Answer 2

Please mark me as brainliest.

Step-by-step explanation:

Solution:

Here,

Calculating mean ,

x f fx

20 8 160

30 12 360

40 20 800

50 10 500

60 6 360

70 4 280

Total N=60 sum of fx=2460

Now,

Mean =2460÷60

Mean = 410