# The number of Science and Mathematics projects submitted by Model high school, Nandpur in last 20 years at the state level science exibition is: - Mathematics

Sum

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.

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#### APPEARS IN

Balbharati Mathematics 8th Standard Maharashtra State Board
Chapter 11 Statistics
Practice Set 11.1 | Q 4 | Page 70