SSC (English Medium) Class 8Maharashtra State Board
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The number of Science and Mathematics projects submitted by Model high school, Nandpur in last 20 years at the state level science exibition is: - SSC (English Medium) Class 8 - Mathematics

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Question

The number of Science and Mathematics projects submitted by Model high school, Nandpur in last 20 years at the state level science exibition is:
2 3 4 1 2 3 1 5 4 2 3 1 3 5 4 3 2 2 3 2. Prepare a frequency table and find the mean of the data.

Solution

The frequency table of the data is follows:
 

Number of projects (`x_i`) Frequency (`f_i`) `f_ix_i`
1 3 1 x 3 = 3
2 6 2 x 6 = 12
3 6 3 x 6 = 18
4 3 4 x 3 = 12
5 2 5 x 2 = 10
  N = 20 `sum f_ix_i` = 55
 

Since, mean of the data = `(sum f_ix_i)/"N"`=5520=2.75

Hence, the mean of the data is 2.75.

  Is there an error in this question or solution?

APPEARS IN

 Balbharati Solution for Balbharati Class 8 Mathematics (2019 to Current)
Chapter 11: Statistics
Practice Set 11.1 | Q: 4 | Page no. 70
Solution The number of Science and Mathematics projects submitted by Model high school, Nandpur in last 20 years at the state level science exibition is: Concept: Concept of Arithmetic Mean.
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