Find the arithmetic mean of the following distribution:
Answers
Step-by-step explanation:
mean = (10×2+ 15×4+20×6+25×8+30×10)/(2+4+6+8+10)
= (20+60+120+200+300)/30
= 700/30
= 70/3
Arithmetic Mean = 23.33
Step-by-step explanation:
We are given the following frequency distribution table below;
Marks obtained (X) No. of students (f)
10 2 20
15 4 60
20 6 120
25 8 200
30 10 300
Total 30 700
Now, the mean of the frequency distribution is given by the following formula;
Mean, =
=
= 23.33
Hence, the arithmetic mean of the given distribution is 23.33.