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Over [174]
3 years ago
7

9. Find the mean of the following data :

Mathematics
1 answer:
Advocard [28]3 years ago
3 0

Answer:

<h3>\boxed{13.15}</h3>

Step-by-step explanation:

( See the attached picture )

Now,

Mean = \mathsf{\frac{Σfx}{n} }

\mathsf{ =  \frac{250}{19} }

\mathsf{ = 13.15}

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

In the case of repeated data , follow the steps given below to calculate the mean :

  • Draw a table with 3 columns
  • Write down the items ( x ) in ascending or descending order in the first column and the corresponding frequencies in the second column.
  • Find the product of each item and it's frequency ( fx ) and write in the third column.
  • Find the total of f column and fx column.
  • Divide the sum of fx by the sum of f ( total number of items ) , the quotient is the required mean.

Hope I helped!

Best regards!

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