# The Following Table Shows the Number of Saplings Planted by 30 Students. - Mathematics

Sum

The following table shows the number of saplings planted by 30 students. Fill in the boxes and find the average number of saplings planted by each student.

 No. of saplings(Scores) xi No. of students(frequncy) fi fi x xi 1 4 4 2 6 _______ 3 12 _______ 4 8 _______ N = _________ ∑fixi =  ______

Mean bar "x" = square/"N"

= square/square
= square
∴ The average number of trees planted square

#### Solution

 No. of saplings(Scores) xi No. of students(frequncy) fi fi×xi 1 4 4 2 6 = 2 x 6 = 12 3 12 = 3 x 12 = 36 4 8 = 4 x 8 = 32 N = 30 ∑fixi= 84

Mean bar "x" = (sum f_ix_x)/ "N"

= 84/30

= 2.8

∴ The average number of trees planted 2.8
Concept: Arithmetic Mean - Raw Data
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#### APPEARS IN

Balbharati Mathematics 8th Standard Maharashtra State Board
Chapter 11 Statistics
Practice Set 11.1 | Q 1 | Page 69