Question

Example-40 : Calculate Geometric mean from the following data.
Marks: 6 7 8 9 10 11 12
No. of Student :
18 26 16 12
12​

Answer 1

your question is wrong where is class interval

mean = sigma fixi

---------------

sigma fi

, sigma fi = add all frequency

, sigma fixi = multiply fi with xi

, xi = add class interval and divide it by 2

hope it will help you

Answer 2

Step-by-step explanation:

total marks = 6+7+8+9+10+11+12

= 63

Mean= sum of obs./ no. of obs.

Therefore,Mean of marks = 63/7 = 9.

_______________________________

total no. of students= 18+26+16+12+12

=84

Mean = sum of obs. / no. of obs.

Therefore, Mean of no. of students =

84/ 5

= 16.8

I don't know whether it is right or not.

But I Hope it helps! !!