Question

Calculate the arithmetic mean, correct to one decimal place, for the following frequency

distribution of marks obtained in a Geometry test.



Marks: 0-10, 10-20, 20-30, 30-40 ,40-50

No of
students: 7, 13, 15 ,12, 3

​

Answer 1

Answer:

7+13+15+12+3

___________

5

50

__

5

= 10.0

Answer 2

Step-by-step explanation:

. . by direct method we can easily find the mean